My oldest son (almost 13) and I love this series. We pre-order every new book and wait anxiously for them to arrive. Then he gets to read them first, while I try to be a nice mom and patiently wait my turn. Not always easy.
Here is the book description found at Goodreads:
He had always wanted to be a warrior. The Rangers, with their dark cloaks and shadowy ways, made him nervous. The villagers believe the Rangers practice magic that makes them invisible to ordinary people. And now fifteen year-old Will, always small for his age, has been chosen as a Ranger's apprentice. What he doesn't realize yet is that the Rangers are the protectors of the kingdom. Highly trained in the skills of battle and surveillance, they fight the battles before the battles reach the people. And as Will is about to learn, there is a large battle brewing. The exiled Morgarath, Lord of the Mountains of Rain and Night, is gathering his forces for an attack on the kingdom. This time, he will not be denied . . . .If you are looking for a new fantasy series or a good series of boy books (good for girls too, though) The Ranger's Apprentice series is wonderful!