After 21 novels, five series, and countless plot lines and characters, the books about Percy Jackson and his companions have come to an end. With the final book in the Trials of Apollo series coming out on October 6, Rick Riordan has wrapped up the world of mythology that he created. Over the span of 15 years, Riordan has written series based on Norse, Egyptian, Greek, and Roman Mythology. With notable characters such as Percy Jackson, Annabeth Chase, Grover, Thalia, and the Greek gods themselves, many young people will remember reading these books when they were growing up.

These books allowed them to escape to Riordan’s carefully crafted world. Not only that, but his characters made were made relatable to young readers, as the first series was through the eyes of young and sassy Percy. With the books coming out periodically over a span of 15 years, both characters and readers grew up together. People became attached to the characters in these 21 books.

While many are sad to see this decade-and-a-half long world coming to an end, it isn’t necessarily the end. In 2020, it was announced that Disney+ would be making a TV show based on the first series, Percy Jackson and the Olympians, each book generating a season. It was also later announced that Netflix would be making three feature films of The Kane Chronicles, a Riordan trilogy based on the Egyptian gods.