The ISBN of Beyond the Nightmare Gate is 0-425-09892-3.
Beyond the Nightmare Gate was created in 1986.
The ISBN of Nightmare in Pink is 9780449224144.
The ISBN of Nightmare in Wichita is 0451217381.
The ISBN of A Writer's Nightmare is 9780140107913.
The ISBN of Stalking the Nightmare is 978-0932096166.
The ISBN of Crashing the Gate is 1931498997.
The ISBN of The Fiftieth Gate is 9780732258047.
The ISBN of Nightmare Academy is 978-0-8499-7617-9.
The ISBN of Peril's Gate is 978-0061052200.
The ISBN of The Lost Gate is 978-0765326577.
The ISBN of The Hour of the Gate is 0-7434-9829-1.
The ISBN of Gate of Ivrel is 0-88677-257-5.