The Book of Tamarind series does not have a new book coming out soon. The latest book, The Great Wave of Tamarind (Book 3), was published in April 2017.
The first book in The Book of Tamarind series, The Lost Island of Tamarind, was published in October 2008.
The Book of Tamarind series primarily falls into the Fantasy genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.