There are 2 books in the Hardy Boys and Tom Swift Ultra Thrillers series.
The Hardy Boys and Tom Swift Ultra Thrillers series does not have a new book coming out soon. The latest book, The Alien Factor (Book 2), was published in June 1993.
The first book in the Hardy Boys and Tom Swift Ultra Thrillers series, Time Bomb, was published in August 1992.
The Hardy Boys and Tom Swift Ultra Thrillers series primarily falls into the Amateur Sleuth genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.