Earplug adventures: evil empire

In this sequel to Cometh the Earplug, Magnuss Earplug and his bounty hunter girlfriend, Hair-Trigger Provost, find themselves embroiled in another fight to save yet another Museum of Future Technology in an another example of the many alternative realities of the Multiverse. This time though it's different: this time the earplugs are the bad guys. And all the young earplugs have to help them is an aging thespian with creaky knees who lives alone upon a mountain top! As per usual this book should be kept away from children under sixteen: the word 'penis' crops up more than once.