El Deafo by Cece Bell (Grades 5 & up). In this graphic novel memoir, author/illustrator Cece Bell chronicles her hearing loss at a young age and her subsequent experiences with the Phonic Ear, a very powerful—and very awkward—hearing aid.
Seifer Tombchewer, a peasant boy living in the macabre Darkling Realm, proves his worth when he is forced to impersonate the missing Prince Talon Pandemonium as diplomat, warrior, and Lord Defender of the Realm.
Roller Girl, by Victoria Jamieson. (Dial Books for Young Readers, an imprint of Penguin Group, "A graphic novel adventure about a girl who discovers roller derby right as she and her best friend are growing apart"-- Provided by publisher.
The Search for WondLa - Tony DiTerlizzi - For kids, teens and adults. Set in the future a young girl looks for other humans in a world of robots, creatures and evil. Not sure if it comes through on ereader, but illustrations are awesome.