"When autumn arrives on 141st Street, the Vanderbeekers are busy helping Mr. Beiderman get ready for the New York City Marathon--and making sure the mysterious person sleeping in the community garden gets enough to eat. But when they discover the true identity of the person making a home in the garden's shed, their world turns upside down. As they attempt to make the world a better place, Isa, Jessie, Oliver, Hyacinth, and Laney learn what it means...