Ann So sorry to be answering this question so long after you asked, RealBadKitty! I just found it! And the answer is no, you don't have to read Where It Began before you read Afterparty. The characters in both books live in L.A. and there's some overlap in the places they go/people they know...but very minor! (Hint: The Valentine's Day party in Afterparty where Dylan gets hammered with other people's secrets he'd rather not know, and sees things he'd rather not see, happens at the home of one of the characters from Where It Began. I don't name the WIB character, but, if you do read WIB first, you'll figure it out.) Thanks for asking!