This is compared in the blurb to one of the most overrated children's books of the last few decades The Tale of Despereaux
and it shouldn't be, because it's a lot better. No cloying "dear reader" narration here, but the charming voice of Helena, oldest surviving mouse daughter of the Cranston family.
Instead, compare this to Margery Sharp
's immortal "Miss Bianca" who was served so badly by Disney's crappy film of The Rescuers
. Here too is humor,wit and adventure. Not as pithy as Sharp, but well done and well worth reading.