BookTok is experiencing a massive wave of nostalgia following the announcement of a new installment to a fan-favorite series.

Rick Riordan announced on Twitter that his iconic Percy Jackson and the Olympians series will have a sixth installment, 13 years after its last entry.

The 58-year-old author confirmed that the new book, which will be titled Percy Jackson and the Olympians: The Chalice of the Gods, will be released on September 26, 2023.

Riordan also revealed that Disney Publishing reached out to him when filming on Disney+'s Percy Jackson TV adaptation was finally greenlit. When asked what could help capitalize on the interest in the series that the show would lead to, he turned to his previously scrapped ideas for inspiration.

"We talked about all manner of things, but I didn't want to publish something just to publish something," Riordan said.

"I wanted it to be a book you all might actually love, a kind of 'thank you' for sticking with me all these years as you waited for a better PJO adaptation."

The new book will be a true rush of nostalgia, as it's set to be the first focused entirely on the main trio of Percy, Annabeth, and Grover since 2005's The Lightning Thief.

The Chalice of the Gods will follow an older Percy as he navigates his senior year of high school. Percy has set his sights on New Rome University, but, in true PJO fashion, he'll have to embark on some epic quests to convince the gods to recommend him for the school.

The news sent shockwaves all around BookTok as long-time Percy Jackson fans came out of the woodwork to celebrate. Many couldn't believe that the announcement was even real, but all immediately jumped right back into the obsession that began when they were just kids.

One fan even kicked off some pretty wild speculations that Riordan has a bigger plan for a crossover event that will link different series.

This all proves nostalgia is still a valuable currency. Think about it, today's twenty-somethings find themselves listening to the same artists on their morning commute as they did on their middle school bus, with The 1975, Taylor Swift, and more gearing up for high-profile album releases.

Now, readers will get to relive their middle-school glory days in Camp Half-Blood too.