Gratuity Tucci (“Tip” for short) has a problem. Aliens have invaded Earth, stolen her mother, and now she and the rest of humanity are being shunted onto small reservations while the invaders (the Boov) take over the rest of the planet. In avoiding this plan, via her family car, Tip runs across J.Lo, a renegade Boov with problems of his own. Together, girl and alien attempt to locate Tip’s mother only to discover that an even greater alien threat is imminent. It’s up to the two heroes to defeat the invaders, Boov and otherwise, and save the day. The humor in this story is undeniably unique, containing a skewed worldview that children will certainly enjoy. Yet while the first half of the book is an entirely funny road trip of the Kerouac-meets-E.T. variety, the second half slows down considerably. Rex has such a nice grasp of small tender moments amidst a world gone haywire, it’s a pity the book wasn’t pared down significantly. Inspired but problematic. (Fiction. 11-15)