It's fun to be a Baby-sitters Little Sister! Welcome to the world of seven-year-old Karen Brewer, the stepsister to Kristy Thomas, who is President of the Baby-Sitters Club! Karen usually tries to do the right thing, but because she has been through some hard times in her young life, she sometimes makes a mistake. Join her in her adventures, and misadventures, with this set of the first 7 books, written by Ann M. Martin, the bestselling author of the original series The Baby-Sitters Club