If you like Eragon by Christopher Paolini

Here are some other suggestions that I hope you will like :

Sabriel by Garth Nix.
Sabriel, daughter of the necromancer Abhorsen, must journey into the
mysterious and magical Old Kingdom to rescue her father from the Land of the Dead. The first in a trilogy.

The Amulet of Samarkand by Jonathan Stroud.
Nathaniel, an apprentice to an ineffective magician, takes matters in
his own hand and summons up a djinni to help him get revenge on the evil Simon Lovelace. This is the first book in the Bartimaeus Trilogy.

Eldest by Christopher Paolini (Yes! We have his new book! ).
After successfully evading an Urgals ambush, Eragon is adopted into the Ingeitum clan and sent to finish his training so he can further help the Varden in their struggle against the Empire.

Revenge of the Witch (book 1, The Last Apprentice series) by Joseph
Delaney.
Young Tom, the seventh son of a seventh son, starts work as an
apprentice for the village spook, whose job is to protect ordinary folk from "ghouls, boggarts, and all manner of wicked beasties."

The Ruins of Gorlan (book 1, The Ranger's Apprentice series) by John
Flanagan.
When fifteen-year-old Will is rejected by battleschool, he becomes the reluctant apprentice to the mysterious Ranger Halt, and winds up
protecting the kingdom from danger.

The Fellowship of the Ring (Lord of the Rings) by JRR Tolkien.
The first volume in the trilogy tells of the fateful power of the One
Ring. It begins a magnificent tale of adventure that will plunge the
members of the Fellowship of the Ring into a perilous quest.

The Golden Compass (His Dark Materials trilogy) by Philip Pullman.
Accompanied by her daemon, Lyra Belacqua sets out to prevent her best
friend and other kidnapped children from becoming the subject of
gruesome experiments in the Far North.