The ISBN of The Catalogue of the Universe is 0007123388.
The ISBN of The Ambidextrous Universe is 0486442446.
The ISBN of Programming the Universe is 978-1400040926.
The ISBN of Masters of the Universe - comics - is 0974800813.
The ISBN of The Elegant Universe is 0-393-05858-1.
The ISBN of The Five Ages of the Universe is 978-0684865768.
The ISBN of Mastering the Universe is 1-578-60223-8.
The ISBN of The Quantum Universe is 978-1-84614-432-5.
The ISBN of George's Secret Key to the Universe is 9781416954620.
The ISBN of The Gene Wars universe is 0-06-105260-4.
The ISBN of The Restaurant at the End of the Universe is 0-345-39181-0.
The ISBN of The Atlas of the DC Universe is 978-0-923763-19-0.