The ISBN of Dark Prince is 0-505-52230-2.
The ISBN of The Vampire Prince is 9780316602747.
The ISBN of The Winter Prince is 978-0689317477.
The ISBN of Fugitive Prince is 978-0002240765.
The ISBN of When It Was Dark is 978-1437364293.
The ISBN of Dragon Prince is 0-88677-450-0.
The ISBN of Prince Serebrenni is 0-543-95808-6.
The ISBN of Grail Prince is 0-345-4564-83.
The ISBN of Every Spy a Prince is 978-0395581209.
The ISBN of The Charnel Prince is 0-345-44067-6.
The ISBN of Prince Caspian is 0-02-044430-3.
The ISBN of A Dark Victory is 1862914060.
The ISBN of A Dark Winter is 1862913684.