My seven year old loved this book so much we had to renew it twice from the library. She's a re-reader, so she's probably read it 8-10 times in the 8 weeks we've had it!
She also read Basher: Planet Earth: What planet are you on? by the same illustrator, and has asked me to get the rest of the series for her. There are quite a few of them, so we'll be working our way through them.