That is Not Dead: Tales of the Cthulhu Mythos Through the Centuries is an anthology of original horror short stories edited by Darrell Schweitzer.

[3] In both instances, the title is derived from a couplet by H. P. Lovecraft attributed to his fictional "mad poet" Abdul Alhazred: "That is not dead which can eternal lie, / And with strange aeons even death may die.

"[4] The book collects fourteen short stories by various authors, with an introduction by the editor.

The effect is to take the Mythos from the realm of contemporary horror into that of historical fiction.

[2][4] The anthology was reviewed by Peter Tennant in Black Static, May-June 2015.