The Potion Diaries series does not have a new book coming out soon. The latest book, Royal Tour (Book 3), was published in October 2016.
The first book in the Potion Diaries series, The Potion Diaries, was published in July 2015.
The Potion Diaries series primarily falls into the Fantasy Romance genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.