New York 2140, by Kim Stanley Robinson
Years after melting Antarctic ice has raised sea levels by 50 feet, New York City is partly submerged, with canals and sky bridges taking the place of streets, turning the city into a Super Venice. Vlade, superintendent of the Met Life Tower condo building keeps busy checking for leaks, when he’s not retrieving residents’ boats from the multilevel boathouse. Charlotte is head of the building’s condo board, and is faced with an anonymous bid to buy the building. The many and varied residents dine together, partly fed by rooftop gardens. Young orphans Roberto and Stefan have a boat and keep getting in trouble as they explore the city, and are repeatedly rescued by financial trader Franklin. In turn, the boys rescue their friend Mr. Hexter and his precious maps from a collapsing building. Inspector Gen of the NYPD, cloud star Amelia Black, who tours the globe in her blimp, and two kidnapped coders known as Mutt and Jeff round out the varied cast of characters who at first have only the building in common. When Roberto and Stefan find sunken gold in the Bronx but need help retrieving the treasure, the residents come together to help the boys, and after a bad hurricane, use the gold to help crash and remake the city’s economic system. Quite a fun, if lengthy read, full of adventure, about a possible future city with appealing, memorable characters.