Hooligan (1941) Miss Withers Regrets (1947) Four Lost Ladies (1949) The Green Ace (1950) [also published as "At One Fell Swoop"] Nipped in the Bud (1951) [also published as "Trap for a Redhead"] Cold Poison (1954) [also published as "Exit Laughing"] Hildegarde Withers Makes the Scene (1969), completed by Fletcher Flora after Palmer's death Short story collections The Riddles of Hildegarde Withers (1947) The Monkey Murder and other Tales (1950) The People Vs. Withers and Malone (1963), written with Craig Rice, crossover with Rice's John J. Malone character Hildegarde Withers: Uncollected Riddles (2002) The Cases of Hildegarde Withers (2012) Hildegarde Withers: Final Riddles? (2021) Short fiction 'The Riddle of the Dangling Pearl' 'The Riddle of the Flea Circus' 'The Riddle of the Forty Costumes' 'The Riddle of the Brass Band' 'The Riddle of the Yellow Canary' 'The Riddle of the Blueblood Murders' 'The Riddle of Forty Naughty Girls' 'The Riddle of the Hanging Men' 'The Riddle of the Black Spade' 'The Riddle of the Marble Blade' 'The Riddle of the Whirling Lights' 'The Bill in the Saucer' 'The Riddle of the Doctor's Double' 'The Riddle of the Jack of Diamonds' 'A Fingerprint in Cobalt' 'The Riddle of the Purple Postcards' 'The Riddle of the Beggar on Horseback' 'Miss Withers and the Unicorn' 'The Riddle of the Green Ice' 'The Puzzle of the Scorned Woman' 'The Hungry Hippo' 'To Die in the Dark' 'The Riddle of the Twelve Amethysts' 'SNAFU Murder' 'The Riddle of the Black Museum' 'The Monkey Murder' 'The Riddle of the Double Negative' 'The Long Worm' 'Fingerprints Don't Lie' 'The Riddle of the Tired Bullet' 'Once Upon a Train' 'Where Angels Fear to Tread' 'Cherchez la Femme' 'The Jinx Man' 'Four Lost Ladies' 'Rift in the Loot' 'Hildegarde and the Spanish Cavalier' 'You Bet Your Life' 'Withers and Malone, Brain-Stormers' 'Who is Sylvia?' 'Withers and Malone, Crime-Busters' 'The Return of Hildegarde Withers' 'Hildegarde Withers Is Back' 'Hildegarde Plays It Calm' Adaptations The Penguin Pool Murder (1932), starring Edna May Oliver Murder on the Blackboard (1934), starring Edna May Oliver Murder on a Honeymoon (1935), starring Edna May Oliver (based on The Puzzle of the Pepper Tree, 1934) Murder on a Bridle Path (1936), starring Helen Broderick The Plot Thickens (1936), starring ZaSu Pitts Forty Naughty Girls (1937), starring ZaSu Pitts 1950s lost TV sitcom pilot Amazing Miss Withers, starring Agnes Moorehead and Paul Kelly A Very Missing Person