While visiting Sea City, Karen tries to bring a bossy girl down a peg by bragging that she saw a real live mermaid in the ocean, until a note from a real mermaid arrives, asking Karen to be her friend.

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Fun in the sunKaren and the family visit a tropical island. There are lots of fun things to do there. Karen explores caves, hunts for seashells, and snorkels in the sea. She even meets a new friend. But Sandy is sad and quiet. Can Karen help Sandy share in her island adventures?

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Karen Brewer, Big SisterEverybody used to love Karen. She was cute. She was the littlest sister. But now baby Emily is in their family, and Karen feels left out. Then Emily gets sick and everybody has to take care of her. Even Karen. And that’s when Karen finds out that being a big sister is the most fun of all!

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! When Karen adopts a grandmother from Stoneybrook Manor, she has more grandmas than anyone she knows -- five! Karen thinks that is very special. But Karen's new grandmother is so different! Grandma B makes Karen listen to old music. And she teaches Karen funny dances, like the foxtrot. Are five grandmothers too many for Karen?

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! WAAA!Karen's friend, Nancy, is going to be a big sister. Her mommy is having a baby. At first, Karen is so jealous. Then Nancy promises to share the baby with her. Now Karen is super excited. Nancy might even bring the baby to school for Show and Share! Karen and Nancy can't wait for the baby to be born. But how much longer will it be?

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Join the band! Karen’s class is taking music lessons, and all of the kids are getting instruments! Instead of a beautiful flute, Karen ends up with a big, old tuba. And she is not very happy about that! Karen’s tuba sounds like a duck with a bad cold. But she’s not giving up. Karen is going to be the best second-grade tuba player ever. Honk, honk!