Who Knocks? is an anthology of horror stories edited by August Derleth. It was published in 1946 by Rinehart.
Who Knocks? has ix+391 pages and contains the following works:
"Alannah" by August Derleth (as Stephen Grendon)
"The Ankardyne Pew" by William F. Harvey
"The Dear Departed" by Alice Mary Schnirring
"The Follower" by Cynthia Asquith
Foreword (Who Knocks?) by August Derleth
"The Ghosts of Steamboat Coulee" by Arthur J. Burks
"The House of the Nightmare" by Edward Lucas White
"The Intercessor" by May Sinclair
"It" by Theodore Sturgeon
"The Lake" by Ray Bradbury
"Negotium Perambulans" by E. F. Benson
"Old Martin" by A. E. Coppard
"The Phantom Farmhouse" by Seabury Quinn
"The Ravel "Pavane"" by Henry S. Whitehead
"A Reversion to Type" by Edgar Lloyd Hampton
"Running Wolf" by Algernon Blackwood
"The Seventeenth Hole at Duncaster" by H. Russell Wakefield
"The Shadows on the Wall" by Mary E. Wilkins Freeman
"The Shunned House" by H.P. Lovecraft
"Squire Toby's Will" by Joseph Sheridan Le Fanu (see Derleth)
"The Woman at Seven Brothers" by Wilbur Daniel Steele
In 1964, Who Knocks? was reissued, this time published by Panther, ISBN #1769.
This edition, at 191 pages, contains only about half of the works contained in the original, not including the original foreword, and no new or additional material is included.
The works contained in the 1964 edition are as follows:
"The Follower" by Cynthia Asquith
"The House of the Nightmare" by Edward Lucas White
"The Intercessor" by May Sinclair
"It" by Theodore Sturgeon
"The Lake" by Ray Bradbury
"Negotium Perambulans" by E. F. Benson
"Old Martin" by A. E. Coppard
"The Phantom Farmhouse" by Seabury Quinn
"The Ravel "Pavane"" by Henry S. Whitehead
"The Seventeenth Hole at Duncaster" by H. Russell Wakefield
"The Shadows on the Wall" by Mary E. Wilkins Freeman
"Squire Toby's Will" by Joseph Sheridan Le Fanu (see Derleth)