2 books · Ages 6–9 · Chapter Books
Groovy Girls Sleepover Club is a 2-book series for ages 6–9 by Robin Epstein. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, Pranks a Lot: The Girls vs. the Boys and Growing Up Groovy: An Out of This World Adventure are great first picks.
No particular order needed — browse and pick what catches your eye.