When Jack and Annie came back from their adventure in Magic Tree House #15: Viking Ships at Sunrise, they had lots of questions. Why did Vikings go on raids? Did they really wear horned helmets? What were Viking ships like? What did Viking kids do all day? It's time to be a Fact Tracker with Jack and Annie!

Their magic tree house takes Jack and Annie back to a monastery in medieval Ireland, where they try to retrieve a lost book while being menaced by Viking raiders.

Hiccup is a Viking teenager who aspires to hunt dragons, but doesn't exactly fit in with his tribe's longstanding tradition of heroic dragon slayers. His world gets turned upside down when he encounters a dragon that challenges him and his fellow Vikings to see the world from an entirely different point of view.

The second installment of Bernard Cornwell's New York Times bestselling series chronicling the epic saga of the making of England-the basis for The Last Kingdom, the hit television series. As the last unvanquished piece of England, Wessex is eyed hungrily by the fearsome Viking conquerors. Uhtred, a dispossessed young nobleman, is tied to the imperiled land by birth and marriage but was raised by the Danish invaders-and he questions where his allegiance...

Geronimo Stiltonord has trouble selecting a winner as the judge of the Shield Mouselet Mega Challenge, and while everyone is distracted by the competition, the dragons launch a surprise attack.

"Born before man recorded time, I lived for thousands of years believing myself to be something I{u2019}m not. Someone I{u2019}m not. Lied to and betrayed by gods, Daimons and Dark-Hunters, I{u2019}ve struggled to find my way in a world where I{u2019}ve been cursed since the moment I was prematurely ripped from my mother and planted into the womb of an innocent woman who thought me her son. Trained as a slayer and predator, I learned to fit in...

Two years after their adventures in The Land of the Silver Apples, the apprentice bard Jack and his Viking companion Thorgil confront the malevolent spirit of a vengeful mermaid and begin a quest that casts them among the fin folk of Notland.

Uhtred of Bebbanburg has won back his ancestral home but, threatened from all sides by enemies both old and new, he doesn't have long to enjoy the victory. In Mercia, rebellion is in the air as King Edward tries to seize control. In Wessex, rival parties scramble to settle on the identity of the next king. And across the country invading Norsemen continue their relentless incursion, ever hungry for land. Uhtred finds himself once again torn between...

"Britain, early tenth century AD: a time of change. There are new raids by the Vikings from Ireland, and turmoil among the Saxons over the leadership of Mercia. A younger generation is taking over. AEthelred, the ruler of Mercia, is dying, leaving no legitimate heir. The West Saxons want their king, but Uhtred has long supported Athelflaed, sister to King Edward of Wessex and widow of Aethelred. Widely loved and respected, Athelflaed has all the...

While Astrid, Snotlout and the rest of the gang are challenging each other to dragon races, Hiccup and Toothless journey through the skies, charting unmapped territories and exploring new worlds. When one of their adventures leads to the discovery of a secret ice cave that is home to hundreds of new wild dragons and the mysterious Dragon Rider, the two friends find themselves at the center of a battle to protect the peace.