Darwen Arkwright & the school of shadows

"Mr. Peregrine has been kidnapped! Now it's up to Darwen, Rich and Alexandra to rescue their beloved--if slightly eccentric--mentor. But as the months pass and Darwen and his friends from Hillside Academy grow no closer to finding the man who introduced them to the magical world of Silbrica, they're left with no choice but to make a deal with the one group they never thought they'd turn to: the Silbrican Guardian Council. The Council promises them assistance in locating Mr. Peregrine if in exchange the Hillside students help them recruit allies in the fight against the evil Greyling. It's the best deal Darwen and his friends could hope for. After all, they share in the Council's hatred of Greyling, having been nearly beaten by him twice; and so they agree to help. They'll embark upon a journey that will take them deeper into Silbrica than they've ever gone before; and there, on the other side of the mirror, they'll find the strangest sight of all ... An exact replica of Hillside Academy."--Jacket flap.