First Stephen King horror book. Very minor !Spoilers!

Ive read MR Mercedez and 11/22/63, both of which I loved. I just started reading IT as my first taste of King's horror and just finished teh chapter Stanley Uris takes a bath. I was pretty blown away. The way King masterfully blends memory and present, creating such a strong sense of who the characters are followed by the mystery of the phone call and then creates the dread of what Patty is about to discover behind the door and then the reveal is unlike anything Ive ever read. Don't know how much Im going to be able to put this book down if at all.