The Adventures of Rowan by Joe Nichols

Three boys set out for a hike through the woods. What started as a day hike turns into an adventure that none of them could have imagined. Each boy finds a path marked with his own initial. The all agree to explore their own paths. This story is about the adventure Rowan, the youngest of the three boys who heads off down the path marked R. He discovers a strange and wonderful land. He also learns of an important mission that only he can accomplish to save the land of R.