These four (4) novels are from the Hush, Hush series. Each book is $5.00, but if you purchase all 4 at once, the price is $15. 1. Hush, Hush (ISBN: 978-1-4169-8941-7) 2. Crescendo (ISBN: 978-1-4169-8943-1) 3. Silence (ISBN: 978-1-4424-2664-1) 4. Finale (ISBN: 978-4424-8123-7) Author: Becca Fitzpatrick Hardcover; excellent condition PLEASE take a peek at the other items I am selling. Thanks!