Whoa—Keanu Reeves is writing a novel.

On Wednesday, Del Rey announced that the Matrix and John Wick star will publish his first novel, The Book of Elsewhere, a collaboration with genre-hopping bestselling novelist China Miéville (The City & the City).

According to a release, the novel is set in the world of BRZRKR, the bestselling comic series Reeves co-created in 2020. The book “follows an immortal warrior on a millennias-long quest to discover the key to his immortality—and perhaps, a way to free himself from it.”

“It was extraordinary to have the opportunity to collaborate on The Book of Elsewhere with one of my favorite authors, China Miéville,” Reeves said in a release, adding that his collaborator “came in with a clear architecture for the story and how he wanted to play with the world of BRZRKR.…I was thrilled with his vision and feel honored to be a part of this collaborative process.”

Miéville praised Reeves as a creative partner, admiring “how glad [he was] to experiment together, how open to true collaboration.”

The Book of Elsewhere is just one part of an ever-expanding universe of BRZRKR, which will include a Netflix live-action adaptation (starring Reeves), as well as an anime spinoff, also produced for Netflix.

The Book of Elsewhere is scheduled for publication on July 23.

Mark Athitakis is a journalist in Phoenix.