Chronicles the adventures and misadventures of Hiccup Horrendous Haddock the Third as he tries to pass the important initiation test of his Viking clan, the Tribe of the Hairy Hooligans, by catching and training a dragon.

Follows the further adventures and misadventures of Hiccup Horrendous Haddock the Third as his Viking training continues and his father leads a stranger and the Hairy Hooligans to the Isle of Skullions in search of a pirate's treasure.

Uhtred is a Saxon, cheated of his inheritance and adrift in a world of fire, sword, and treachery. He has to make a choice: whether to fight for the Vikings, who raised him, or for King Alfred the Great of Wessex, who dislikes him. In the late ninth century, Wessex is the last English kingdom. The rest have fallen to the Danish Vikings, a story told in The Last Kingdom, the New York Times bestselling novel in which Uhtred's tale began. Now the Vikings...

Britain, early 10th 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. Æthelred, the ruler of Mercia, is dying, leaving no legitimate heir. The West Saxons want their king, but Uhtred has long supported Æthelflaed, sister to King Edward of Wessex and widow of Æthelred. Widely loved and respected, Æthelflaed has all the makings...

The year is 878. Uhtred, the dispossessed son of a Northumbrian lord, has helped the Saxons of Wessex defeat the invading Danes. Now, finally free of his allegiance to the victorious, ungrateful King Alfred, he is heading home to rescue his stepsister, a prisoner of Kjartan the Cruel in the formidable Danish stronghold of Dunholm. Uhtred's best hope is his sword, Serpent-Breath, for his only allies are Hild, a West Saxon nun fleeing her calling, and...

A fragile peace governs the kingdoms of Wessex, East Anglia, under the rule of the late King Alfred's son, King Edward, and Mercia, under his daughter Aethelflaed. Uhtred, her formidable champion and greatest warrior, controls the northern parts from the strongly fortified city of Chester. But no one can prepare them for the storm that is about to descend. The Northmen, allied to the Irish, come in force under the cover of night, up the Mersey, perhaps...

On their daring trip to Valhalla, three Vikings, even the littlest, use their skills in different ways.

When exiled Arab courtier Ahmad Ibn Fadlan comes across a band of Vikings, he is appalled by their way of life, but after a fortune teller warns the Northmen of a mysterious enemy, Admad is compelled to enter into battle with them.

Chief Stoick wants to train his own dragon and enlists his son Hiccup to help him tame the most ferocious species yet.

Someone has stolen the Fire Egg. Now the volcano on Volcano Island is active and the tremors are hatching the eggs of the exterminator dragons! Can Hiccup return the Fire Egg to the volcano, stop the volcano from erupting, and save the Tribes from being wiped out by the terrible sword-claws of the Exterminators.