2018 - Forsaken [A Unit 51 Novel] (Paperback) ISBN-13: 9780786041602 ISBN-10: 0786041609 Genres: Literature & Fiction, Mystery, Thriller & Suspense 2 2017 - Subhuman [A Unit 51 Novel] (Paperback) ISBN-13: 9780786041589 ISBN-10: 0786041587 Genres: Literature & Fiction, Mystery, Thriller & Suspense, Science Fiction & Fantasy 4 |