Life among the mustangs, life among the settlers, the ""Coming Together."" ""The Understanding"" a highly structured exposition that finally unites a boy and the horse he'd locked eyes with when the other was a wild colt. In the background is the Texas rebellion against Mexico; in the foreground is dry detail, although the mustangs have more vitality than the people. That ""coming together"" is fortuitous and friendship follows like everthing else in this small book because the author tells us so. Flatly.