10 paperbacks
I have a dozen of listings in this series (1-10, 11-20, 21-30, 31-40, 41-50, 51-60, 61-70, 71-80, 81-90, 91-100, 101-110, and 111-120). There are 10 books in each lot. Search "Baby-Sitters Club x1 (e.g., 61) lot" to find them.