Fear Stalks the Village

Ethel Lina White

Bloody Lessons (A Victorian San Francisco Mystery #3)

M. Louisa Locke

The Littlehampton Libels: A Miscarriage of Justice and a Mystery about Words in 1920s England

Christopher Hilliard

Penning Poison: A history of anonymous letters

Emily Cockayne

The Poison Pen Letters: The Village Detectives, Book 2

Fiona Walker

A Pen Dipped in Poison (Liz, Pat and Thelma, #2)

J.M. Hall

The Poison Pen (The Clara Fitzgerald Mysteries #6)

Evelyn James

Death in a White Tie (Roderick Alleyn, #7)

Ngaio Marsh

The Long Divorce (Gervase Fen, #8)

Edmund Crispin

Night at the Mocking Widow (Sir Henry Merrivale, #20)

Carter Dickson

The Mystery of the Spiteful Letters (The Five Find-Outers, #4)

Enid Blyton

The Voice of the Corpse

Max Murray

Poison in the Pen (Miss Silver, #29)

Patricia Wentworth

Penne Dreadful (Italian Chef Mysteries #1)

Catherine Bruns

Gaudy Night (Lord Peter Wimsey, #12)

Dorothy L. Sayers

A Spoonful of Poison (Agatha Raisin, #19)

M.C. Beaton

The Moving Finger

Agatha Christie