Ernie Cline’s 2011 debut novel Ready Player One is being made into a blockbuster movie thanks to Steven Spielberg, but it looks like Cline might be bringing readers back to the OASIS for another adventure. During a Facebook Live event in which Cline debuted the film’s second trailer, he confirmed that he was working on a sequel to the book.

Set in a massive virtual reality world called OASIS, Ready Player One follows Wade Watts, a teenager who spends his time searching for three hidden Easter eggs left behind by the system’s founder. Aided by fellow hunters such as Art3mis, they have to race against a massive corporation that wants control of OASIS. In the years since it was published, the book has become popular read for genre fans.

Cline’s last novel was 2015’s Armada, another story stuffed with Easter eggs about gaming and 1980s science fiction movies, but it wasn’t connected to his first. Cline noted in 2015 that he had written a couple of outlines for a potential sequel, but hadn’t started writing the book at that point. Later that year, he signed a massive deal for a new novel with Crown Publishing, although there were no details about what the book would be about, other than that it would be in the “sci-fi genre.”

During today’s livestream (at the 27:06 mark), he was asked if it was true that he was writing a sequel. “It’s true. I can’t talk about it too much, but there’s no better inspiration for a writer [than] to return to a world they’ve already worked on when they’re watching Steven Spielberg bring that world to life.” Cline didn’t reveal any other details about what the book would be about or when it would come out, other than to say that he had the chance to bounce some ideas off of Spielberg.