[3] A thirteen-year-old boy named Tommy Sanderson goes missing after spending time with his friends, Josh Griffin and Luis Fernandez, at Borderland State Park in Massachusetts.

His mother Elizabeth, younger sister Kate, and grandmother are thrown into disarray as strange events begin occurring; a mysterious apparition appears in his mother's room and discarded pages from his journal that may provide potential clues as to his whereabouts begin to surface.

Arnold claims to be a "seer" and ends up giving all three boys a harrowing backstory of satanic activity at Split Rock.

Jason Heller of NPR wrote that the novel "takes the simple premise of a lost child and twists it into a dizzying emotional vortex" and that "the most powerful aspect of Disappearance ... is its immediacy.

He whispers his tale, punctuating it with the 'clicks and whirrs' of an air conditioner or the life-mocking ring of a child's bicycle bell.