The ISBN of Royal Escape is 978-1-4022-1076-1.
The ISBN of Escape from Kathmandu is 0312931964.
The ISBN of Escape from Memory is 9780689854217.
The ISBN of The Royal Mess is 9780758212085.
The ISBN of Escape from Raven Castle is 0440924065.
The ISBN of Escape of the Living Dead is 1592910475.
The ISBN of Royal Robbins is 910856-56-7.
The ISBN of Escape from Robotropolis is 0-312-93081-X.
The ISBN of Escape from Hell - novel - is 978-0765316325.
The ISBN of Escape from Earth is 978-1-58288-225-3.
The ISBN of Sword Stained with Royal Blood is 9789573260387.
The ISBN of By Royal Command is 978-0-141-38451-1.
The ISBN of Madness Under the Royal Palms is 1401322913.