Pecos Bill: The Greatest Cowboy of All Time, by Dr. James Cloyd Bowman

This very fun book relates a number of chronological tales about Pecos Bill, the fabled cowboy.  It starts with how he is lost by his family and raised by coyotes, and then how he comes to learn that he is actually a human.  After that he meets the members of the IXL ranch and becomes their leader, and because life among the coyotes taught him the languages of the animals and gave him great strength, he performs a number of fantastic feats (such as taming Pegasus, the most ornery and wild horse ever seen).  A number of common-sense practices are attributed to him as well (such as cattle branding).

The chapters are of moderate length but are quick and easy reads.  And they all have a lot of dry humor; I can see this book having made a really fun classic Disney film (live-action, of course).