The ISBN of The Dragon's Apprentice is 978-1-4169-5897-0.
The ISBN of The Good Apprentice is 0670809403.
The ISBN of The Magician's Apprentice is 9780316037884.
The ISBN of The Spook's Apprentice is 0-09-945645-1.
The ISBN of The Dragons of Eden is 0394410459.
The ISBN of Space Apprentice is 0-02-615220-7.
The ISBN of The Dragonslayer's Apprentice is 0-590-63093-8.
The ISBN of The Beekeeper's Apprentice is 0-312-10423-5.
The ISBN of The Shadow Dragons is 978-1416958796.
The ISBN of Sorcerer's Apprentice - book - is 1-55970-580-9.
The ISBN of Dragons of Darkness is 0-441-16662-8.
The ISBN of Dragons in the Waters is 0-374-31868-9.
The ISBN of Dawn of the Dragons is 0-425-14568-9.