Brisingr by Christopher Paolini, the third book in the Inheritance series--Eragon (book 1), Eldest (book 2).
Synopsis of Eragon: In Alagaesia, a fifteen-year-old boy of unknown lineage called Eragon finds a mysterious stone that weaves his life into an intricate tapestry of destiny, magic, and power, peopled with dragons, elves, and monsters.
Due to be released by Knopf Books on September 20
The Magician: The Secrets of the Immortal Nicholas Flamel by Michael Scott is the second book (in a series of 7). The first book, The Alchemyst was brilliant!
Synopsis: While working at pleasant but mundane summer jobs in San Francisco, fifteen-year-old twins, Sophie and Josh, suddenly find themselves caught up in the deadly, centuries-old struggle between rival alchemists, Nicholas Flamel and John Dee, over the possession of an ancient and powerful book holding the secret formulas for alchemy and everlasting life.
Due to be released by Delacorte Books on June 24
Synopsis: Seventeen-year-old Aislinn, who has the rare ability to see faeries, is drawn against her will into a centuries-old battle between the Summer King and the Winter Queen, and the survival of her life, her love, and summer all hang in the balance.
Due to be released by HarperTeen on April 29
Synopsis: Irish teenager JJ Liddy discovers that time is leaking from his world into Tir na nOg, the land of the fairies, and when he attempts to stop the leak he finds out a lot about his family history, the music that he loves, and a crime his great-grandfather may or may not have committed.
Due to be released by HarperTeen on May 27
Synopsis: Suddenly able to see demons and the Darkhunters who are dedicated to returning them to their own dimension, fifteen-year-old Clary Fray is drawn into this bizzare world when her mother disappears and Clary herself is almost killed by a monster.
Due to be released by Margaret K. McElderry on March 25
Clementine's Letter by Sara Pennypacker, sequel to Clementine and The Talented Clementine
Synopsis of Clementine: While sorting through difficulties in her friendship with her neighbor Margaret, eight-year-old Clementine gains several unique hairstyles while also helping her father in his efforts to banish pigeons from the front of their apartment building.
Due to be released by Hyperion on April 1
The Mysterious Benedict Society and the Perilous Journey by Trenton Lee Stewart and Carson Ellis, sequel to The Mysterious Benedict Society.
Synopsis: After passing a series of mind-bending tests, four children are selected for a secret mission that requires them to go undercover at the Learning Institute for the Very Enlightened, where the only rule is that there are no rules.
Due to be released by Little, Brown May 1
The Penderwicks on Gardam Street by Jeanne Birdsall, sequel to The Penderwicks: A Summer Tale of Four Sisters, Two Rabbits, and A Very Interesting Boy
Synopsis: While vacationing with their widowed father in the Berkshire Mountains, four lovable sisters, ages four through twelve, share adventures with a local boy, much to the dismay of his snobbish mother.
Due to be released by Knopf Books for Young Readers on April 8