
The Ace of Knaves is a collection of three mystery novellas by Leslie Charteris, first published in the United Kingdom in 1937 by Hodder and Stoughton, and in the United States by The Crime Club. This book continues the adventures of Charteris' creation, Simon Templar, alias The Saint. Later editions of the book were retitled The Saint in Action. The adventures in this book mark the return of Templar's longtime girlfriend and partner Patricia Holm and his nemesis, Chief Inspector Claud Eustace Teal since The Saint Goes On.

The Arabian Nights Murder, first published in 1936, is a detective story by John Dickson Carr featuring his series detective Gideon Fell. This novel is a mystery of the type known as a whodunnit.

Artists in Crime is a detective novel by Ngaio Marsh; it is the sixth novel to feature Roderick Alleyn, and was first published in 1938. The plot concerns the murder of an artists' model; Alleyn's love interest Agatha Troy is introduced.

The Black Spectacles, first published in 1939, is a detective story by John Dickson Carr featuring his series detective Gideon Fell. This novel is a mystery of the type known as a locked room mystery.

The Boar is a novel written by American author Joe R. Lansdale, set in East Texas in 1933 during the Great Depression.

The Bowstring Murders is a mystery novel by the American writer John Dickson Carr (1906–1977), who wrote it under the name of Carr Dickson. It is a whodunit and also his only novel with the alcoholic detective John Gaunt.

The Cape Cod Mystery, first published in 1931, is a detective story by Phoebe Atwood Taylor, the first to feature her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit.

Castle Skull, first published in 1931, is a detective story by John Dickson Carr which features Carr's first series detective, Henri Bencolin. This novel is a mystery of the type known as a whodunnit.

Charlie Chan Carries On (1930) is the fifth novel in the Charlie Chan series by Earl Derr Biggers.

The Clue of the Broken Locket is the eleventh volume in the Nancy Drew Mystery Stories series. It was first published in 1934, and was written by Mildred Benson under the pseudonym Carolyn Keene. It was later revised by Harriet Stratemeyer in 1965, and the story was mostly changed with a few elements of the original.
Cold Steal is a novel that was published in 1939 by Phoebe Atwood Taylor writing as Alice Tilton. It is the third of the eight Leonidas Witherall mysteries.

The Crimson Patch, first published in 1936, is a detective story by Phoebe Atwood Taylor which features her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit.

The Crooked Hinge is a mystery novel (1938) by detective novelist John Dickson Carr. It combines a seemingly impossible throat-slashing with elements of witchcraft, an automaton modelled on Maelzel's Chess Player, and the story of the Tichborne Claimant. It was dedicated to fellow author Dorothy Sayers "in friendship and esteem."

The Cut Direct is a novel that was published in 1938 by Phoebe Atwood Taylor writing as Alice Tilton. It is the second of the eight Leonidas Witherall mysteries.

Death from a Top Hat (1938) is a locked-room mystery novel written by Clayton Rawson. It is the first of four mysteries featuring The Great Merlini, a stage magician and Rawson's favorite protagonist.

Death in a White Tie is a detective novel by Ngaio Marsh. It is the seventh novel to feature Roderick Alleyn, and was first published in 1938. The plot concerns the murder of a British lord after a party.

Death in Ecstasy is a detective novel by Ngaio Marsh, the fourth to feature her series detective, Chief Inspector Roderick Alleyn of Scotland Yard. It was first published in 1936.

Deathblow Hill, first published in 1935, is a detective story by Phoebe Atwood Taylor which features her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit.

The Devil To Pay is a novel that was published in 1938 by Ellery Queen. It is a mystery novel primarily set in Los Angeles, United States.
The Door Between is a novel that was published in 1937 by Ellery Queen. It is a mystery novel primarily set in New York City, United States.

The Dragon's Teeth is a mystery novel published in 1939 featuring the popular fictional character Ellery Queen, which is also the pseudonym of the book's authors, Daniel Nathan and Manford (Emanuel) Lepofsky. It is primarily set in New York City, United States.

Drop To His Death is a mystery novel by the American writer John Dickson Carr, who published it under the name of Carter Dickson, in collaboration with John Rhode. It is a locked room mystery.

The Eight of Swords, first published in February 1934, is a detective story by American writer John Dickson Carr, featuring his series detective Gideon Fell. It is a mystery novel of the type known as a whodunnit.

Figure Away, first published in 1937, is a detective story by Phoebe Atwood Taylor which features her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit. In 1939, the novel was serialised by several newspapers as ‘Old Home Week Murder’.

The Four False Weapons, first published in 1937, is a detective story by John Dickson Carr featuring his series detective Henri Bencolin. This novel is a mystery of the type known as a whodunnit.

The Garden Murder Case is the ninth in a series of mystery novels by S. S. Van Dine about fictional detective Philo Vance.

The Gracie Allen Murder Case (1938) is the eleventh of twelve detective novels by S. S. Van Dine featuring his famous fictional detective of the 1920s and 1930s, Philo Vance. It also features the zany half of the Burns and Allen comedy team. It is in some ways a roman à clef, including not just Burns and Allen but also such characters as Gracie's mother and brother. That gave the book an unusual feel, as did the comic tone of much of Gracie's dialogue. This tone suddenly shifts in a later chapter to one character's philosophically anguished speculations, and then back again to Gracie.

Hag's Nook, first published in 1933, is a detective story by American writer John Dickson Carr and the first to feature his series detective Gideon Fell. It is a mystery novel of the whodunnit type.

Halfway House is a novel that was written in 1936 by Ellery Queen. It is a mystery novel primarily set in New Jersey, United States.

The Haunted Bridge is the fifteenth volume in the Nancy Drew Mystery Stories series. It was originally published by Grosset & Dunlap in 1937.

It Walks By Night, first published in 1930, is the first detective novel by John Dickson Carr which features for the first time Carr's series detective Henri Bencolin. This novel is a mystery of the type known as a whodunit.

Keeper of the Keys (1932) is the sixth and last mystery in the Charlie Chan series of Earl Derr Biggers; Biggers was planning on continuing the series, but died in 1933 before he could. The films continued the series for him.

The Kidnap Murder Case is a 1936 murder mystery novel by S. S. Van Dine, the tenth of twelve books featuring fictional detective Philo Vance.

The Mad Hatter Mystery, first published in 1933, is a detective story by American writer John Dickson Carr, featuring his series detective Gideon Fell. This novel is a mystery of the type known as a whodunnit.

A Man Lay Dead is a detective novel by Ngaio Marsh; it is the first novel to feature Roderick Alleyn, and was first published in 1934. The plot concerns a murder committed during a detective game of murder at a weekend party in a country house. Although there is a side-plot focused on Russians, ancient weapons, and secret societies, the murder itself concerns a small group of guests at Sir Hubert Handesley's estate. The guests include Sir Hubert's niece, Charles Rankin, Nigel Bathgate, Rosamund Grant, and Mr and Mrs Arthur Wilde. Also in attendance are an art expert and a Russian butler. Unlike later novels, this novel is more focused on Nigel Bathgate and less so on Alleyn.

The Message in the Hollow Oak is the twelfth volume in the Nancy Drew Mystery Stories series. It was written under the pseudonym Carolyn Keene and first published in 1935.

Murder at the New York World's Fair is a novel that was published in 1938 by Phoebe Atwood Taylor writing as Freeman Dana. It is the only mystery she wrote under that name.

The Mystery of the Cape Cod Tavern, first published in 1934, is a detective story by Phoebe Atwood Taylor which features her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit.

Out of Order, first published in 1936, is a detective story by Phoebe Atwood Taylor which features her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit.

Overture to Death is a detective novel by Ngaio Marsh; it is the eighth novel to feature Roderick Alleyn, and was first published in 1939. The plot concerns a murder during an amateur theatrical performance in a Dorset village, which Alleyn and his colleague Fox are dispatched from Scotland Yard to investigate and duly solve.

Poison In Jest, first published in 1932, is a detective story by John Dickson Carr which does not feature any of Carr's series detectives. This novel is a mystery of the type known as a whodunnit.

The Problem of the Wire Cage, first published in 1939, is a detective story by John Dickson Carr featuring his series detective Gideon Fell. This novel is a mystery of the type known as a locked room mystery.

The Punch and Judy Murders is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson. It is a whodunnit and features the series detective Sir Henry Merrivale.

The Reader is Warned is a mystery novel by the American writer John Dickson Carr, who published it under the name of Carter Dickson. It is a whodunit and features the series detective Sir Henry Merrivale.

The Red Widow Murders is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson. It is a locked room mystery and features his series detective, Sir Henry Merrivale.

Sandbar Sinister, first published in 1934, is a detective story by Phoebe Atwood Taylor which features her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit.

They Wouldn't Be Chessmen is a 1934 British detective novel by A.E.W. Mason. It is the fourth book in the Inspector Hanaud series of novels.

Thieves' Picnic is a mystery novel by Leslie Charteris featuring his Robin Hood-inspired crime fighter, Simon Templar, alias "The Saint". The book was first published in the United Kingdom in 1937 by Hodder and Stoughton, and in the United States by The Crime Club the same year. Later editions of the book were retitled The Saint Bids Diamonds; another alternate title is The Saint at the Thieves' Picnic.

The Tinkling Symbol, first published in 1935, is a detective story by Phoebe Atwood Taylor which features her series detective Asey Mayo, the "Codfish Sherlock". This novel is a mystery of the type known as a whodunnit.

To Wake the Dead, first published in 1938, is a detective story by John Dickson Carr featuring his series detective Gideon Fell. This novel is a mystery of the type known as a whodunnit.

The Unicorn Murders is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson. It is a locked room mystery and features his series detective, Sir Henry Merrivale.

Vintage Murder is a detective novel by Ngaio Marsh; it is the fifth novel to feature Roderick Alleyn, and was first published in 1937. Based in New Zealand, the plot centres on a travelling theatrical troupe and prominently features Doctor Rangi Te Pokiha a Māori, and a "tiki" (hei-tiki) a Māori fertility pendant.

The Waxworks Murder, first published in 1932, is a detective story by John Dickson Carr featuring his series detective Henri Bencolin of the Parisian police. This novel is a mystery of the type known as a whodunnit.

The White Priory Murders is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson. It is a locked room mystery and features his series detective, Sir Henry Merrivale, assisted by Scotland Yard Inspector Humphrey Masters.

The Winter Murder Case (1939) is a Philo Vance novella that S. S. Van Dine intended to expand into his twelfth full-length book, a project cut short by his death. The Winter Murder Case seems especially similar to the B mystery movies of the 1930s, a cross between Van Dine's usual style and the film style. It was intended as a vehicle for Sonja Henie.