As the Kingdom of Araluen prepares for war against Morgarath, Will and Horace accompany the Ranger Gilan on a mission to Celtica. But Celtica's villages and mines are silent. Only an exhausted and starving girl called Evanlyn can tell them why: Morgarath has sent his foul creatures to enslave the Celts. While Gilan rides swiftly back to Araluen to report this news to the King, Will and Horace discover the true purpose behind Morgarath's actions.

Will and Evanlyn are bound for Skandia as the captives of the fearsome Skandian wolfship captain, Erak. Halt has sworn to rescue Will, and he will do anything to keep his promise – even defy his King. Expelled from the Rangers, Halt is joined by Horace as he travels through Gallica towards Skandia. On their way, they are constantly challenged by freelance knights – otherwise known as thieving thugs.

Can sworn enemies fight side by side to save their lives and their kingdoms? Just as spring approaches and Will and Evanlyn can finally escape Skandia, Evanlyn is carried off by mysterious horsemen. Will sets out after them, but one boy against six fierce Temujai warriors is impossible odds - even for a Ranger apprentice. Halt and Horace arrive just in time. But the happiness of their reunion is cut short when Halt realizes these Temujai are only scouts for a massive invasion force.

Five years have passed since the Skandians and the Araluans made their treaty, and Will has finally become a Ranger, with his own fief to look after. He soon learns that even sleepy little islands have problems to keep him on his toes. Then he and his old friend Alyss are thrown into a terrifying new adventure, investigating the truth behind rumours of sorcery in a remote northern fief.

What does it mean to earn the Silver Oakleaf? So few men have done so. For Will, a mere boy, that symbol of honour has long felt out of reach. Now, in the wake of Araluen's uneasy truce with the raiding Skandians comes word that the Skandian leader has been captured by a dangerous desert tribe. The Rangers are sent to free him. But the desert is like nothing these warriors have seen before.

Will is at the annual Ranger Gathering but Halt is investigating mysterious happenings in the west. When he does finally return, it’s with bad news: Hibernia is in turmoil. A false religious cult calling themselves the Outsiders are sowing confusion and sedition, and five of the six Hibernian kingdoms have been undermined. Now the sixth, Clonmel, is in danger. Halt, Will and Horace set out to restore order. Can the secrets of Halt’s past help them in their mission?

The renegade outlaw group known as the Outsiders may have been chased from Clonmel, but not before killing Halt's only brother. Now Rangers Halt and Will, along with the young warrior Horace, are in pursuit. The Outsiders have done an effective job of dividing the kingdom into factions and are looking to overtake Araluen. It will take every bit of skill and cunning for the Rangers to survive. Some may not be so lucky.

Horace is missing. Months have passed since he was sent on a military mission to Nihon-Ja. Evanlyn is worried, and in company with Will, Alyss, and Halt, she sets out to discover what has become of their old friend. They find that Horace has become embroiled in Nihon-Ja politics. The arrogant Senshi Sect has rebelled against the rightful Emperor, who Horace supports. Now he and Will must turn farm and forest workers into a fighting force that can face the highly trained Senshi warriors.

After a senseless tragedy destroys his life, Will is obsessed with punishing those responsible - even if it means leaving the Ranger Corps. His worried friends must find a way to stop him taking such a dark path.It is Halt who suggests the solution: Will must take an apprentice. The candidate Halt has in mind will surprise everyone - and it will be a request Will cannot refuse. Training a rebellious, unwilling apprentice is hard enough.

John Flanagan returns to the world of Ranger’s Apprentice to find out what happens when Will’s apprentice, Maddie - the Royal Ranger - returns home to Castle Araluen. The Kingdom may have been at peace for a number of years, but there are always those who would commit treason to take power for themselves. When Maddie learns of a plot against the crown, she must go undercover to find out more - and hopefully stop it. But going undercover isn’t easy when you’re the princess - even if you’re trained as a Ranger. 

King Duncan and Princess Cassandra are trapped high in the south tower of Castle Araluen. In the north, Sir Horace and Ranger Commandant Gilan are besieged in an old hill fort as they wait for the Red Fox Clan's next attack. Ranger's apprentice Maddie must find the Heron brotherband and convince them to join her, so she can give her father the help he needs to break out from the hill fort and ride to confront the traitor. Will they reach Castle Araluen in time? And when the battles have been fought and the dust has settled, who will rule the Kingdom of Araluen?

The New York Times best-selling series continues with another nail-biting mission for Will Treaty and his fearless young apprentice. King Philippe of Gallica appeals to King Duncan for help. His son is being held hostage by a power-hungry baron, and Philippe wants Duncan to send a Ranger to rescue the boy. Will and Maddie are perfect for the task. Travelling as father and daughter to allay suspicion, they will pose as entertainers to infiltrate the Chateau des Falaises, where the prince is being held. 

The Ranger's Apprentice origin story fans have been waiting for. Before they became the most famous Ranger in the land and the hard-working Ranger Commandant, Halt and Crowley were young friends determined to change the world. The scheming Baron Morgarath is drawing other power-hungry knights and barons to his banner. King Oswald is wasting away, and, if gossip can be believed, Prince Duncan is causing havoc in the north.

What really happened at Hackham Heath that made Halt a hero to the entire Kingdom? This is the prequel Ranger's Apprentice fans have been waiting for. When the former Baron Morgarath escaped to avoid punishment for treason, an uneasy peace fell on Araluen. But the Rangers know Morgarath will be planning his next move, and there are rumours he has recruited an army of savage, inhuman creatures. Newly crowned King Duncan must prepare for war.

In Skandia, there is only one way to become a warrior. Boys are chosen for teams called brotherbands and must endure three months of gruelling training in seamanship, weapons and battle tactics. It's brotherband against brotherband, fighting it out in a series of challenges. There can be only one winner. When Hal Mikkelson finds himself the unwilling leader of a brotherband made up of outcasts, he must step up to the challenge.