"Karen has new roller skates. She is a very good skater. She can even do tricks. But oh, no! Karen falls down and breaks her wrist! She has to go to the hospital and get a cast. Karen wants somebody famous to sign her cast. It isn't going to be easy--but Karen won't give up till she gets the job done!"-- Provided by publisher

"Fifth-grade best friends Kenzie "Kenzilla" and Shelly "Bombshell" dream of becoming roller derby superstars one day, but when a junior league forms and they must recruit teammates, will their friendship survive?" -- (Source of summary not specified)

Warned not to try out her new skates, Sammy straps them on anyway, resulting in a wild ride through town.

"Juana's life in Bogotá, Colombia, is just about perfect. Every now and then a big problema comes along--like having to learn English or Juana's mami getting remarried--but things eventually settle down, and life goes back to feeling pretty perfect again. But then Mami springs two new sorpresas on Juana. One: Juana will be spending her school break going to skating camp instead of relaxing (even though she doesn't know how to skate!). Two: Mami...

Presents the story of how compromise helps two roller-skating best friends, who often do not agree, remain the best of friends.

Forced to invite her nemesis to her roller-skating birthday party, Aleca Zamm struggles to hide her ability to stop time while searching for a fellow Wonder.