There are 4 books in the Science of Discworld series.
The Science of Discworld series does not have a new book coming out soon. The latest book, The Science of Discworld IV: Judgement Day (Book 4), was published in January 2013.
The first book in the Science of Discworld series, The Science Of Discworld, was published in June 1999.
The Science of Discworld series primarily falls into the Fantasy genre.