There are 4 books in the Tales of the Batcave series.
The Tales of the Batcave series does not have a new book coming out soon. The latest book, Dino Death-Trap (Book 4), was published in August 2016.
The first book in the Tales of the Batcave series, The Penguin's Power Parasol, was published in August 2016.
The Tales of the Batcave series primarily falls into the Action Adventure genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.