From the introduction:
Rangers have been a beloved icon of fantasy ever since The Lord of the Rings, though they have always held a somewhat awkward, in-between place in Pathfinder and the third edition of Dungeons and Dragons. Most easily summed up as “halfway between a fighter and a druid,” the ranger class seems to be a strange and eclectic collection of hand-me-down druid class features, coupled with a base attack bonus and extra feats reminiscent of a fighter. The ranger’s most iconic class feature, favored enemy, can certainly be devastating in the right circumstances, but in general serves more as a “swingy” version of weapon training that is much better when fighting certain groups of creatures, and worthless the rest of the time, and leaves a bit to be desired in the way of actually evoking any feelings of hunting or woodsman’s lore.