25 Baby-Sitters Club Books. This collection includes the original series, titles 1-16, 18, 23, 40, 46, and 47. Additionally, you will receive The Baby-Sitters Club Mystery #2, and Baby-Sitters Little Sister books 1, 30, and 40. These books are all used, but most are in excellent condition. #23 has had its spine taped, and there may be evidence of minor wear on some of the other books as well.