The ISBN of The World Inside is 0-385-03621-3.
The ISBN of Letters from the Inside is 978-0440219514.
The ISBN of Dying Inside is 0-684-13083-1.
The ISBN of Inside Sahara is 0-297-84304-4.
The ISBN of The Angel Inside is 978-0-385-52102-4.
The ISBN of Inside the Third Reich is 978-1-84212-735-3.
The ISBN of Showboat World is 0515036986.
The ISBN of The Great World is 0701134151.
The ISBN of Bad World is 0970678487.
The ISBN of At the Edge of the World is 0345018796.
The ISBN of World of Ptavvs is 978-0345345080.
The ISBN of The World Is My Home is 978-0812978131.
The ISBN of World Almanac is 978-1600571480.