The Druid's Guise Trilogy3 books in series
The Mighty Publisher's Summary
He's not crazy. Honest, he's not.
He's just Wyatt. Wyatt the Mighty.
Fifteen-year-old Wyatt has been sent to a treatment center for "disturbed youth". No one understands him. He wants nothing more than to escape from it all.
And he does.
Through a magic he doesn't understand, he finds himself in Hagion, a realm of fantastical creatures and immense wonder. He quickly finds himself in the company of a runaway warrior and two Children - a strange race of underground creatures that seem forever joyful. They claim Wyatt is a Druid, a powerful figure of myth and legend, sent to restore peace to all of the Realms. He doesn't bother correcting them.
Finally, he can be the hero he's always dreamed of.
But claiming to be a hero and actually being a hero are two different things. And it's a lesson Wyatt may have to pay dearly for.
A mature YA(ish) fantasy/contemporary tale.