France Mitchell painted 13 portraits of the city for the children's book "Where is the Sears Tower?" which she co-wrote with her husband Tad. The story follows Peter Pigeon on his journey to visit his grandfather, who lives in Willis Tower. The Mitchells will be at Books-a-Million at 144 S. Clark St. from noon to 2 p.m. on Dec. 12 signing books and meeting with readers.