Ranger’s Apprentice: The Ruins of Gorlan by John Flanagan (and sequels). Chapter Book.“This quartet opener introduces five teenaged orphans raised together in the medieval-like kingdom of Araluen, focusing on the apprenticeship of wiry, clever Will to a mysterious scout/spy, and on Will’s changing relations with oversized, rival-later-friend Horace. Though Will’s slight physique keeps him out of Battleschool, his first choice, it turns out to be just the ticket for Ranger work, which combines survival skills and keen powers of observation with the ability to move about unseen. As Will is learning these arts, Horace is finding Battleschool almost more than he can handle, thanks to a trio of particularly brutal bullies—and further afield, evil Lord Morgarath, being bent on conquest, has sent two kalkera, brutish bear/apes, out to assassinate Araluen’s most prominent war leaders. (Fantasy. 11-13)” Source: Kirkus Reviews

Recommended to me by a current middle-grade reader; a great read.