Rick Riordan's seventh Percy Jackson book, 'Wrath of the Triple Goddess,' was released on Sept. 24. The author spoke to PEOPLE about the longevity of the series, 19 years after the first was released.

NEW YORK, Jan. 30 (UPI) --Best-selling, young-adult literature author Rick Riordan says television is a much better medium than film for his Percy Jackson epics. More than 30 million copies of ...

Six books, two spin-off series and more than 180 million copies later, Riordan’s bedtime story has grown into one of the most popular fantasy franchises in children’s literature.

Rick Riordan continued to talk about the topic during our interview (which you can watch in the video above): I hope so. I mean, one of the things is to acknowledge that the kids have learning ...

You can watch TheWrap’s full interview with Rick and Becky Riordan in the video above. “Percy Jackson and the Olympians” premieres on Disney+ on December 20. Sign Up to Breaking News.

RICK RIORDAN I was involved in every writers room, I read every draft of every script, we gave notes on everything. So we were very intimately involved with every single episode.