The Endinfinium series does not have a new book coming out soon. The latest book, Benjamin Forrest and the Lost City of the Ghouls (Book 3), was published in May 2018.
The first book in the Endinfinium series, Benjamin Forrest and the School at the End of the World, was published in November 2017.
The Endinfinium series primarily falls into the Heroic Fantasy / Sword & Sorcery genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.