Summer Adventures

Raven Rise (Pendragon Series #9) by D. J. MacHale
This is where it begins. The showdown for Halla. At stake is nothing less than all that ever was and all that will be.
There's only one thing missing--Bobby Pendragon.
While Bobby remains trapped on Ibara, the battle moves to his home territory: Second Earth. Mark Dimond and Courtney Chetwynde are left on their own to defend Second Earth against the forces of Saint Dane. They must face off against a charismatic cult leader who has risen to power by revealing a shattering truth to the people of Earth: They are not alone.
The Convergence has broken down the walls. The territories are on a collision course. The final phase of Saint Dane's quest to rule Halla is under way.
And Bobby Pendragon is nowhere to be found.

Artemis Fowl: The Time Paradox by Eoin Colfer
Artemis's mother has contracted a deadly disease -- and the only cure lies in the brain fluid of African lemurs. Unfortunately, Artemis himself was responsible for making the lemurs extinct five years ago. Now he must enlist the aid of his fairy friends to travel back in time and save them. Not only that, but he must face his deadliest foe yet...his younger self.

The Fire Eternal by Chris D'Lacey
Five years have passed since David Rain, now a bestselling author, disappeared mysteriously in the Artic. Slowly the ice is changing; bears are starving; dragons are rising; and the spirit Gaia, goddess of the Earth, is restless, wanting to act upon these changes. But all living things may suffer if she does. As the weather grows wilder and the ice caps melt, all eyes turn from the north to David's daughter, Alexa. She is the key to stopping it. . . . Can one girl save the world from the forces of evil before she disappears like her father?