Amazon has acquired the rights to new fantasy novel Ninth House.

The book is the latest work from Grishaverse author Leigh Bardugo, and marks the writer’s first adult novel.

The Grishaverse series, including Six of Crows, were a veritable hit, spending over a year on the New York Times bestseller list. They books have sold a cumulative 3 million copies in English and been translated into 41 languages. It is no surprise, then, that Netflix is already adapting Shadow and Bone for the screen.

Indeed, in a post-Game of Thrones landscape, the race to create the next big genre sensation is firmly on. With Ninth House named book of the month at Apple, Barnes & Noble and Amazon, and with an order of 350,000 copies for its first print run, it has sparked a bidding war between players such as HBO and Hulu. Amazon, though, has won out, reports Deadline, with Bardugo attached to write and excec produce the adaptation.

The book is set at an alternate Yale, where secret societies guard dangerous, magical secrets and ghosts haunt the campus.

Bardugo‘s frequent collaborator Pouya Shahbazian will also exec produce the series.