Question: Crown Books was a bookseller headquartered in Lake Arbor, an unincorporated community in Prince George's County, Maryland, near Largo and which town's official name, and is the seat of Prince George's County, Maryland in the United States?

Context paragraphs:
Kettering, Maryland: Kettering is an unincorporated area and census-designated place (CDP) in Prince George's County, Maryland.  The population was 12,790 at the 2010 United States Census, primarily African American.  Kettering is adjacent to Prince George's Community College, the upscale gated community of Woodmore, Six Flags America, Evangel Temple megachurch, and the community of Largo at the end of the Washington Metro Blue Line.  Watkins Regional Park in Kettering offers a large playground, a colorful carousel, miniature golf, a miniature train ride, and various animals.

Largo Town Center station: Largo Town Center is an island platformed Washington Metro station in Largo, Maryland, United States.  The station was opened on December 18, 2004, and is operated by the Washington Metropolitan Area Transit Authority (WMATA).  Providing service for the Blue and Silver Lines, it is the eastern terminus of the Blue and Silver Lines, and serves the town of Largo and The Boulevard at the Capital Centre.  In December 2012, Largo Town Center was one of five stations added to the route of the Silver Line, which was originally supposed to end at the Stadium–Armory station, but was extended into Prince George's County, Maryland to Largo Town Center due to safety concerns about a pocket track just past Stadium–Armory.  Therefore, Largo Town Center is also the eastern terminus of the Silver Line, which began service on July 26, 2014.  It is the first and so far only station in Prince George's County outside the Capital Beltway, and is located about a mile from FedExField, the home of the Washington Redskins.  Largo Town Center is also a major commuter station, with two parking garages, containing a total of 2,200 spaces, connected by a bridge at the top level.

Morgan Boulevard station: Morgan Boulevard is an island platformed Washington Metro station in Summerfield, Maryland, United States.  The station was opened on December 18, 2004, and is operated by the Washington Metropolitan Area Transit Authority (WMATA).  Providing service for the Blue and Silver Lines, the station is located on Garrett Morgan Boulevard, one mile from FedExField, the home of the Washington Redskins.  The stadium is about a 19-20 minute walk to the stadium from the station.  In December 2012, Morgan Boulevard was one of five stations added to the route of the Silver Line, which was originally supposed to end at the Stadium-Armory station, but was extended into Prince George's County, Maryland to the Largo Town Center station (the eastern terminus of the Blue Line) due to safety concerns about a pocket track just past Stadium-Armory.  Silver Line service at Morgan Boulevard began on July 26, 2014.  This is one of the few stations not served by Metrobus.  The Prince George's County bus system, called simply TheBus, serves this station.  The platform at this station is wider than others and the station features double the number of faregates of similar stations because of the large volumes of passengers using it before and after football games.  For commuters, there is a day care facility at the station.

Prince George's County Sheriff's Office: The Prince George's County Sheriff's Office (PGSO), officially the Office of the Sheriff, Prince George's County (PGOS), provides law enforcement services in Prince George's County, Maryland in the United States.  Its headquarters are located in Upper Marlboro, near the Depot Pond.  The sheriff is the chief law enforcement officer of Prince George's County and is elected every four years.  There are no term limits for the sheriff.

Upper Marlboro, Maryland: Upper Marlboro, officially the Town of Upper Marlboro, is the seat of Prince George's County, Maryland in the United States.  The population within the town limits was 631 at the 2010 U.S. Census, although Greater Upper Marlboro is many times larger.

Prince George's County Public Schools: The Prince George's County Public Schools System (PGCPS) is a large public school district administered by the government of Prince George's County, Maryland, United States and is overseen by the Maryland State Department of Education.  The school system is headquartered in Upper Marlboro and the district serves Prince George's County.  The district is headed by Kevin M. Maxwell and a 14-member Board of Education.

Lake Arbor, Maryland: Lake Arbor is an unincorporated area and census-designated place (CDP) in Prince George's County, Maryland, United States.  The population was 9,776 at the 2010 census.  It is one of the nation's most affluent African-American communities.  The ZIP Codes encompassing the CDP area are 20721 and 20774.

Crown Books: Crown Books was a bookseller headquartered in Lake Arbor, an unincorporated community in Prince George's County, Maryland, near Largo and Upper Marlboro.  It was founded in the Washington, D.C., metro area by Robert Haft in 1977.  Crown Books (retail) is of no relation to Crown Books (publisher), although the former carried inventory from the latter.

Secondary School Reform in Prince George's County: The Prince George's County Public Schools system (PGCPS) is a large school district administered by the government of Prince George's County, Maryland, United States and is overseen by the Maryland State Department of Education.  The school system is headquartered in Upper Marlboro and the district serves Prince George's County.

Prince George's Community College: Prince George's Community College (PGCC) is a community college located in the unincorporated community of Largo in Prince George's County, Maryland, United States.  The college serves Prince George's County, Maryland and surrounding areas, including Washington, D.C.

Supporting paragraphs: Crown Books Upper Marlboro, Maryland
Answer: Town of Upper Marlboro