The product is a hardcover book titled "If This Book Exists, You're in the Wrong Universe: A John, Dave, and Amy Novel" by Jason Pargin, part of the John Dies at the End series. Published by St. Martin's Press in 2022, this horror and thriller novel with a touch of humor is illustrated and spans 432 pages. The book, intended for general audiences, is written in English and offers a unique storyline set in a parallel universe where the characters navigate through various challenges and supernatural events.