If you are contacting Mick Wade to find out why book 4 isn’t finished yet, book 4 of the Mud, Blood and Motocross series is on hold while Calamity Press produces Vol. 1 of the graphic novel. Not to mention that Mick Wade* is busy riding trails and jumping out of airplanes.
*Mick Wade is the pen name used by the author of the Mud, Blood and Motocross Series. (The real author is very boring and almost never jumps out of airplanes.)