There are 2 books in the Knight and the Wonderer series.
The Knight and the Wonderer series does not have a new book coming out soon. The latest book, The Secret of Stonehenge (Book 2), was published in April 2014.
The first book in the Knight and the Wonderer series, The Grail of Sir Thomas, was published in May 2013.
The Knight and the Wonderer series primarily falls into the Fantasy genre.