SET of 6 - Puppy Patrol books

6 books by Jenny Dale Puppy Patrol series: # 16, 17, 20, 21, 22, 23 Softcover - books never read. Good condition! Some of the inside covers and pages may have turned yellowish over time. Some small stickers & writing on the inside covers covered by labels. Small writing on first page top corner. Small pocket on back cover. Books have been sitting on a shelf for years and haven’t been opened. Some spines seem not very tight. See pictures.