Isola is a section of a fictional city that is the setting for the 87th Precinct series of police procedural novels written by Ed McBain (pseudonym of Evan Hunter). The city is based on New York City, and similarly, has five sections, corresponding with the five boroughs of New York: Isola (Manhattan), Bethtown (Staten Island), Calm's Point (Brooklyn), Majesta (Queens), and Riverhead (Bronx). It has two major rivers, the Harb and the Dix, which inexplicably flow in a westerly direction despite the fact that Isola is on the East Coast.