Mrs. Frisby and the Rats of NIMH
Mrs. Frisby and the Rats of NIMH Steaminess Rating
If this book were any less steamy, you would need to buy a humidifier for your house to prevent nosebleeds. There is no sex or romantic interest between the characters. We know that Mr. and Mrs. Frisby made little Frisbys, but that is the extent of it. It's okay that little pitchers have big ears here, as this novel is about as G-rated as they come.