by Rebecca Rubin Seligson (Author), Brigid Malloy (Illustrator), Travis Peterson (Designed by)

As superhero good-deed-doers, Zee & Nina transform into Super Wheels & Super Sidekick Sister (or

"Triple S" for short) whenever a good deed needs doing. One day, while playing at the park, Zee & Nina hear their friend Zoey call for help. They spring into action, encouraging Zoey to become her own superhero as they work together to figure out who stole Zoey's book.