Treasure Island: Runaway Gold by Jewell Parker Rhodes

Three kids. One dog. And the island of Manhattan, laid out in an old treasure map. Zane is itching for an adventure that will take him away from his family’s boarding house in Rockaway, Queens. So when he is entrusted with a real treasure map, leading to a spot somewhere in Manhattan, Zane wastes no time in riding the ferry over to the city to start the search with his friends Kiko and Jack and his dog, Hip-Hop.