The Smoke Thieves series does not have a new book coming out soon. The latest book, The Burning Kingdoms (Book 3), was published in August 2020.
The first book in The Smoke Thieves series, The Smoke Thieves, was published in May 2018.
The Smoke Thieves series primarily falls into the Epic Fantasy genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.