The ISBN of The Case of the Toxic Spell Dump is 0-671-72196-8.
The ISBN of Stig of the Dump is 9780140347241.
The ISBN of Stig of the Dump is 9780140347241.
The ISBN of Spell Wars is 1842070061.
The ISBN of The Bachelors - novel - is 0811214249.
The ISBN of Spell of the Witch World is 9780886772420.
The ISBN of Spell Compendium is 0-7869-3702-5.
The ISBN of The Spell - novel - is 978-0-7011-6519-2.
The ISBN of The Hamilton Case is 1740511972.
The ISBN of The Case for Latvia is 9789042024243.
The ISBN of The Case for Mars is 0684835509.
The ISBN of The Case for God is 978-0307269188.
The ISBN of Just in Case is 978-0141380780.