The Penguin Pool Murder (1931)

Murder on the Blackboard (1932)

Murder on Wheels (1932)

The Puzzle of the Pepper Tree (1933)

The Puzzle of the Silver Persian (1934)

The Puzzle of the Briar Pipe (1936)

The Puzzle of the Red Stallion (1936)

The Puzzle of the Blue Banderilla (1937)

The Puzzle of the Happy Hooligan (1941)

Miss Withers Regrets (1947)

The Riddles of Hildegarde Withers (1947)

Four Lost Ladies (1949)

Green Ace (1950)

The Monkey Murder: And Other Hildegarde Withers Stories (1950)

Nipped in the Bud (1951)

Cold Poison (1954) aka Exit Laughing Trap for a Redhead (1955)

Hildegarde Withers Makes the Scene (1969) (with Fletcher Flora)

Uncollected Riddles (2002)