Chronicles of the Misplaced Prince Series by Seán Cullen

With a pimply face and braces on his teeth, the perpetually clumsy Brendan is having a hard time at school. When he starts hearing voices and conversing with chipmunks, he thinks he can add losing his mind to his growing list of problems. Then he discovers that he's a Faerie who was lost in the human world... moreWith a pimply face and braces on his teeth, the perpetually clumsy Brendan is having a hard time at school. When he starts hearing voices and conversing with chipmunks, he thinks he can add losing his mind to his growing list of problems. Then he discovers that he's a Faerie who was lost in the human world. Now that he knows his true identity, the human disguise that has been protecting him begins to fade and a whole host of wicked creatures tries to tempt him to use his Faerie power for evil intentions. It's up to Brendan to protect the human world, and to make the ultimate choice between the family he has grown up with and his new Faerie roots. less

Brendan figures his troubles are over. Sure, he’s going to have to hide the fact that he’s a Faerie from his human family and his friends at school, but now that he’s been initiated and survived his quest, the hardest part is behind him. Right? Wrong. In The Prince of Two Tribes, Brendan discovers that his troubles are only beginning. He has to prove his worthiness to the Faerie World in a series of difficult tests, and he’s having trouble mastering even the simplest of his talents.