What happens between book 9 of the Young Wizards series, A Wizard of Mars, and book 10, Games Wizards Play? Diane Duane answers the question in this volume, collecting together the three canonical works that constitute a "transitional trilogy" between books 9 and 10 -- a 150,000-word extravaganza of heretofore untold tales. Interim Errantry contains: The novella Not On My Patch, the tale of an unusual Halloween in the Young Wizards'...