Mary Anne Spier's stepsister, Dawn, arrives for a visit, bringing along a friend, Sunny, who is trying to cope with her mother's death, a situation Mary Anne had once been through herself.

Mary Anne's been going through some big changes lately, but when a friend who's facing her own difficulties comes to stay for the summer, can Mary Anne help her cope?

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! It's the day the members of the BSC had thought would never come-- the day they graduate from Stoneybrook Middle School. Kristy is worried that this will mean the end of the BSC. Mary Anne realizes she has to set things straight with her ex-boyfriend, Logan. Stacey is stressed about her parents, And claudia isn't sure she'll be allowed to graduate at all. As graduation day comes closer, all the past and present BSC members come together to share their stories of Stoneybrook and the BSC. It's time for them to say good-bye. But their memories and their friendships will last forever.

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! It's a summer the BSC members will never forget. For some, it's time to leave the club. For others, it's time to make a new beginning. Plenty of surprises await them--boyfriend troubles, friendship feuds, tough decisions, and totally unexpected adventures. Throughout it all, one thing is for sure: By the time the summer is over, the BSC will be very different... and better than ever!

Stacey and Claudia never dreamed anything could threaten their best friendship. But when they both fall for the same boy, the biggest rivalry in BSC history begins.

Kristy and Carey have always been arch rivals. The feud reaches a fever pitch when they're assigned to write biographies about each other.

Mary Anne's been going through some big changes lately, but when a friend who's facing her own difficulties comes to stay for the summer, can Mary Anne help her cope?