London: Hodder & Stoughton, (1983). SIGNED hardcover first edition - The third children's book by this Irish writer, one which returns "to the delightful world of Tim, the little boy whose friendship with Mattie, the mouse the magic dazzle, leads him into fantastic adventures. This time it is Mattie himself who is in mortal danger, and even with the help of a new friends, Minerva, Tim fears that all is lost." SIGNED by O'Brien on the title page, and uncommon thus. Illustrated by Peter Stevenson. Large format. 44 pp. ISBN: 0-340338962.