The Baby-Sitters Little Sister Series Complete 17-Book Set (Books 1–17) by Ann M. Martin is a charming and timeless collection that follows Karen Brewer, the fun, curious, and confident little sister of Kristy from The Baby-Sitters Club. Through relatable adventures and everyday challenges, Karen learns about friendship, family, and growing up — always with humor, heart, and imagination. This complete 17-book set includes the following titles: 1) Karen’s Witch 2) Karen’s Roller Skates 3) Karen’s Worst Day 4) Karen’s Kittycat Club 5) Karen’s School Picture 6) Karen’s Little Sister 7) Karen’s Birthday 8) Karen’s Haircut 9) Karen’s Sleepover 10) Karen's Grandmothers 11) Karen's Prize 12) Karen's Ghost 13) Karen's Surprise 14) Karen's New Year 15) Karen's In Love 16) Karen's Goldfish 17) Karen's Brothers