Quasar Quartz Quest - Puzzle Planet Author:Malorie Blackman A puzzle game book set in the future and in space in which a problem must be solved at the end of each chapter in order to proceed. Zach and Emma travel to Stellar Outpost 44 on the Quasar star cruiser and must solve the mystery of the missing Quartz, the force which keeps the Quasar on course and in space. Illustrated by Patrice Aggs.