Buzz recommends this guidebook, though it’s not been revised since 1999. The author’s been called controversial.
This is a canyon hiking guide to the Colorado Plateau, which covers the southeastern half of Utah, the northern half of Arizona, the western 1/5 of Colorado, and a small part of NW New Mexico. …
Michael R. Kelsey
… on June 9, 1970 he put a pack on his back and started traveling. Since then he has seen 223 countries, republics, islands, or island groups. When not traveling the world he is seeking out and exploring the canyon countries of the Southwest’s Colorado Plateau. All his wanderings have resulted in a very successful series of 16 self-published books. …
besthike.com 
MK is “idiosyncratic” at the minimum; “(fill in the blank)” to others. He always lists his own times for hikes, which are fast; the NPS gets tired of rescuing people who believe his estimates. All route descriptions are the minimum required to get it done. I actually like his personal, bare-boned style. Mostly, he opened myself and many others up to the hidden treasures of the CP. Half of what is in his tomes does not exist anywhere else. The guy is indefatigable.
Agreed! Some of his ideas are amusingly crazy (he suggests swimming the Colorado with your pack on an air mattress to get access to the Maze area of Canyonlands!), others might get you into trouble if you just had his minimal descriptions and weren’t already experienced. But he also describes loads of hikes into canyons that aren’t technical or dangerous, that you won’t find in other guidebooks. So it’s a great resource for ideas, best followed up by searching for other descriptions / better maps etc.