When people speak of potentially-deadly books, they usually refer to the radical or controversial ideas they contain, but in the case of one very scary book, the potential for lethalness is quite literal.
Shadows from the Walls of Death: Facts and Inferences Prefacing a Book of Specimens of Arsenical Wall Papers is a book published in 1874 by Dr. Robert M. Kedzie, a Union surgeon during the American Civil War who later became a professor of chemistry. Of its 100 or so pages, 86 are just samples of arsenic-pigmented wallpaper that people used to decorate their homes during those times. Even though arsenic was a known toxin capable of killing a person if ingested, no one imagined it could kill even when used as an active ingredient to make wallpaper colors more vibrant. Kedzie did, though, so he printed this book as a warning.
