The Burning Bridge (The Ranger's Apprentice, Book 2)

Bracing for a final clash with the evil warlord Morgarath, the Rangers rally the kingdom's allies, and Will is chosen, along with his friend Horace, as special envoys to nearby Celtica. But the simple mission soon takes an unsettling turn - the Celticans have disappeared, their town abandoned. The scheming hand of Morgarath, it seems, has been far from idle. He has found a way to bring his legions over the once impassible eastern mountains and is planning to ambush the king's army in a rout. 

The Ruins of Gorlan (The Ranger's Apprentice, Book 1)

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 Sorcerer of the North (The Ranger's Apprentice, Book 5)

Will is just settling into his first post as a brand-new, just-commissioned Ranger when he is dispatched to deal with problems on the kingdom’s northern border. Though his keen senses and uncanny expertise with his knives and his bow are vital, Will’s success often hinges on his ability to assess the skills and intentions of those around him. The scenes involving Will, his mentor, Halt, and Halt’s mentor, Crowley, work beautifully to fill in background information, dramatize Will’s growing maturity, and entertain readers with clever dialogue. The Sorcerer of the North is a must-have volume for fans of the popular Ranger’s Apprentice series

The Siege of Macindaw (The Ranger's Apprentice, Book 6)

After years as a Ranger’s apprentice, Will is now the protector of his first fief. Not long into his service, everything that can go wrong does: Keren, a renegade knight, has taken over Castle Macindaw, a strategic gateway to the North—poisoning the royal family in the process—and is holding Will’s friend Alyss captive. The situation grows direr when Will uncovers Keren’s secret alliance with the Scotti, who have plans to plunder Araluen. Time is of the essence, and Will must recruit a motley crew to rescue Alyss and reclaim Castle Macindaw—before the Scotti can make it their own.

The Kings of Clonmel (The Ranger's Apprentice, Book 8)

Mankind puts its faith in many things—gods, kings, money—anything for protection from the world’s many dangers. When a cult springs up in neighboring Clonmel, promising to quell the recent attacks by lawless marauders, people flock from all over to offer gold in exchange for protection. But this particular group, with which Halt is all too familiar, has a less than charitable agenda. Secrets will be unveiled and battles fought to the death as Will and Horace help Halt in ridding the land of a dangerous enemy. The worldwide phenomenon is back with a gripping new adventure.

Yet for these Rangers, the peril is only beginning...