The Forgotten Mansion Chronicles: Storm:

Frey didn't expect to wake up in a mysterious mansion, far from home and surrounded by strange rooms that seem to shift when no one's looking. But the place has its own rhythm-and its own secrets.
With only a cranky shape shifter, a soft-hearted artist, and an increasingly fussy house for company, Frey begins to untangle the past hidden in dust-covered books and quiet corners. Something's wrong beneath the surface of the mansion. Something forgotten. And if they don't fix it soon, they might...