The Magic Squad and the Dog of Great Potential — Mary Quattlebaum

To Calvin Hastings, days after school at Alfred Ludlott's house are the pits. Sure, Alfred has a big lawn and a dachshund named Fitz. But Calvin's talented and gifted younger brother, Monk, and his bossy, overachieving neighbor, Jenny Teitletot, are getting on his nerves! No wonder Calvin jumps at the chance to visit the local humane shelter with Alfred's neighbor, Dr. Jamar.

At the humane shelter, Calvin falls in love with Train, a big, loud, friendly dog with "great potential." Calvin has got to find Train a home--but where? His apartment building won't allow dogs or cats, Dr. Jamar is already fostering a pet, and Alfred Ludlott has Fitz. Calvin's just about ready to give up when he finds out that Train isn't the only one with "great potential."