You got: IT
You are IT! Published in 1986, you are Stephen King’s harrowing (and traumatizing) tale of a group of seven friends who fight a mythical, shape-shifting entity, first as children, and then again as estranged adults. Will the gang of heroes, known as “The Losers,” overcome this ancient evil, or will IT destroy them and everyone they love?Read yourself to find out!
Fitting that I'd get the book that essentially ruined me for life. I still check sewers as I walk by. I won't even get started on clowns.