The Thackery T. Lambshead Pocket Guide to Eccentric & Discredited Diseases (2003) is an anthology of fantasy medical conditions edited by Jeff VanderMeer and Mark Roberts, and published by Night Shade Books. The Guide claims to be 83rd in a series of editions inaugurated by the fictional Dr. Thackery T. Lambshead in 1915, and contains generally humorous entries (in varying degrees of darkness) with disease descriptions by several popular authors such as Neil Gaiman, Alan Moore and Michael Moorcock, which together detail the "secret medical history" of the 20th Century.