Good-Bye Stacey, Good-Bye

Oh no! Stacey McGill is moving back to New York! That means no more Stoneybrook Middle School, no more Charlotte Johanssen, and worst of all... no more Baby-sitters Club!
Stacey's friends are crushed when they hear that Stacey's moving, Claudia most of all. Stacey was her first best friend.
How will the BSC cope without Stacey? What kind of going-away present is good enough for someone as special as she is? But most important... who is going to be the next member of the Baby-sitters Club?