Cynthia Voigt

Fredle, a young mouse cast out of his home, faces dangers and predators outside, makes some important discoveries and allies, and learns the meaning of freedom as he struggles to return home.

Max's parents are missing. They are actors, and thus unpredictable, but sailing away, leaving Max with only a cryptic note, is unusual even for them. Did theyintend to leave him behind? Have they been kidnapped? 
Until he can figure it out, Max feels it's safer to keep a low profile. Hiding out is no problem for a child of the theater. Max has played many roles, he can be whoever he needs to be to blend in. But finding a job is...