What's it about?
This is a brilliant little book for kids (aged 8 to 12) about a planet hopping girl named Zita. The book starts with her on Earth playing outside with a friend, Joseph. Her friend gets sucked through a portal and Zita runs away in fear and shock (she is only little after all). Given some time to get over the shock, she returns to where Joseph was taken, reactivates the portal, and goes through herself in order to rescue him. She finds herself on a planet which everyone is evacuating as it is due to blow up in 3 days.