De Vermis Mysteriis

Ludwig Prinn's De Vermis Mysteriis was a book of arcane knowledge.

A 16th century German black letter edition of the book was in the collection of the Library of St John the Beheaded in 1887. Sherlock Holmes considered it a remarkably good copy. (PROSE: All-Consuming Fire)

Ace found a copy in Gilles Lemaitre's villa in Haiti in 1915. (PROSE: White Darkness)

Behind the scenes

 * The fictional De Vermis Mysteriis and its author Ludwig Prinn were creations of . It first appeared in his short story . His correspondent, H. P. Lovecraft, included it in several of his own stories, including and . It was also incorporated into other stories by literary friends of Lovecraft.