On the planet Nebulon in 2120, Zack joins his school's Explorer's Club and visits Juno, a planet made of crystals, but he is less than thrilled when he is partnered with the class bully.
- ISBN10 1442453907
- ISBN13 9781442453906
- Publish Date 2 April 2013
- Publish Status Active
- Publish Country US
- Publisher Simon & Schuster
- Imprint Little Simon
- Format Paperback (US Trade)
- Pages 128
- Language English