HUGE SET OF 20 MAGIC TREE HOUSE, MERLIN MISSION & FACT TRACKER BOOKS BY MARY POPE OSBORN, good to very good condition from a smoke-free home.Some of the books look like they were never read; some are First Editions. Merlin Mission is for more advanced readers ages 7 through 9. Books listed as follows:#1-8,#10,#14,#16,#19,#20-21,#26,#28-29, 36; Merlin Mission #30 and Fact Tracker Sabertooth and the Ice Age. Important: Book#20 back lower right corner has damage,#21 name inside front cover,#26 teacher's marks,#30 missing two stickers (please see pictures).