One of Earth's oldest allies is sick - deadly sick. What can Lucky, Chase and their best friend Arren do to prevent an impending techno-apocalypse? Perhaps the mysterious Caretaker of planet Earth can provide answers, if only they knew who or where he was! Or will a sick machine bent on self-preservation overtake the entire world… The Mechanizer is the 4th book in Dr Joe's "Space Chase" series that explore sound scientific concepts through a fun and engaging narrative. Learn about forces, motion, friction and gravity as Lucky, Chase, and their alien friend Arren save the world!