Baby-Sitters Series : Litter Sister /
Ann M. Martin
- New York, NY : Scholastic Inc. Apple Paperbacks, c1989.
- 101 p. : ill. ; 19 cm.
- Karen's Litter Sister (#6) Karen's Surprise (#13) Karen's Good-bye (#19) Karen's Carnival (#20) Karen's Little Witch (#22) Karen's Doll (#23) Karen's Pen Pal (#25) Karen's Big Joke (#27) Karen's Secret (#33) Karen's Wedding (#39) Karen's Toothache (#43) Karen's Big Weekend (#44) Karen's New Bike (#62) Karen's Movie (#63) Karen's Toys (#65) Karen's Island Adventure (#71) Karen's Half Birthday (#78) Karen's Paper Route (#97) Karen's Hurricane (#113) .