Slenderman : Online Obsession, Mental Illness, and the Violent Crime of Two Midwestern Girls, Hardcover by Hale, Kathleen, ISBN 080215980X, ISBN-13 9780802159809, Brand New, Free shipping in the US

Using court transcripts, police reports, individual reporting and exclusive interviews, this page-turning true crime story recounts the attempted murder of 12-year-old Bella Leutner at the hands of two girls who believed they needed a sacrifice to keep Slenderman—a figure born on the internet—at bay.