Rogue Magic - The Natural Order School of Magic, #2

His professors are convinced theirs is the only magical organization in the world. Tristan isn't so sure. Just before Tristan returns for his second year at the Lair, he wakes to the smell of smoke. His house is on fire, and he suspects Darla Merridy is involved. His professors think otherwise. Accused once again of arson, Tristan is certain someone is targeting their school. For some reason, groups of mountaineers have suddenly begun leading tours through their valley-in the dead of winter.
And Zeke's home mysteriously disappeared in a mudslide over the summer. But no one listens to him. Meanwhile, classes have begun, and this time Tristan and Amber are learning to use the Map Room themselves. While their classes grow more challenging than ever, the students are forced to reconcile themselves with the academy's dark purpose. But their work will be for nothing if the school isn't safe.
Something is lurking in the forest nearby, and it won't stay hidden forever.