The ISBN of The Dark Secret of Weatherend is 0-8037-0072-5.
The Dark Secret of Weatherend is by John Anthony Bellairs. The Dial edition has 182 pages. Publisher's Weekly said, "This is lusty, fast, witty and intricate entertainment,"
The ISBN of Cybele's Secret is 9780330423540.
The ISBN of Secret Windows is 0165006439.
The ISBN of Secret of the Sirens is 0192754602.
The ISBN of "My Secret Garden" by Nancy Friday is 978-1416567011.
The ISBN-10 for "When It Was Dark" by Guy Thorne is 1973723696.
The ISBN of The Secret - book - is 978-1582701707.
The ISBN of A Dark Victory is 1862914060.
The ISBN of A Dark Winter is 1862913684.
The ISBN of In the Winter Dark is 0869140450.
The ISBN of Plowing the Dark is 0374234612.
The ISBN of The Dark Arena is 0345441699.