The Library Hotel is a 60-room boutique hotel in New York City, located at 299 Madison Avenue (at 41st Street), near the New York Public Library, Bryant Park, and Grand Central Terminal. The Hotel was designed by architect Stephen B. Jacobs.

The hotel boasts a unique organizing principle: each of its ten guest floors has a theme, designated after a major category of the Dewey Decimal Classification (the 5th floor, for example, is the 500s, the Sciences), with each room as a subcategory or genre, such as Mathematics (Room 500.001) or Botany (Room 500.004). (Dewey categories 000, 100, and 200 are placed on the 10th, 11th, and 12th floors, respectively.) Other room themes include Erotic Literature (Room 800.001), Poetry (Room 800.003), and Music (Room 700.005). All rooms have a small complement of books and decorations that accompany the theme, with 6000 books overall throughout the hotel.
Because of this classification scheme, the hotel owners were sued in 2003 by the OCLC (owners of the Dewey Decimal Classification system). OCLC reached an agreement with the hotel enabling the hotel to continue using the Dewey system.

Hotel Denouement from Lemony Snicket's The Penultimate Peril was modeled after the Library Hotel.
Room menu
 
Third Floor: Social Sciences
 300.006 Law
 300.005 Money
 300.004 World Culture
 300.003 Economics
 300.002 Political Science
 300.001 Communication
 
Fourth Floor: Language
 400.006 Ancient Language
 400.005 Middle Eastern Language
 400.004 Asian Language
 400.003 Germanic Language
 400.002 Romance Language
 400.001 Slavic Language
 
Fifth Floor: Math and Science
 500.006 Astronomy
 500.005 Dinosaurs
 500.004 Botany
 500.003 Zoology
 500.002 Geology
 500.001 Mathematics
 
Sixth Floor: Technology
 600.006 Health & Beauty
 600.005 Computers
 600.004 Medicine
 600.003 Management
 600.002 Manufacturing
 600.001 Advertising
 
Seventh Floor: The Arts
 700.006 Fashion Design
 700.005 Music
 700.004 Photography
 700.003 Performing Arts
 700.002 Paintings
 700.001 Architecture
 
Eighth Floor: Literature
 800.006 Mystery
 800.005 Fairy Tales
 800.004 Dramatic Literature
 800.003 Poetry
 800.002 Classic Fiction
 800.001 Erotic Literature
 
Ninth Floor: History
 900.006 Biography
 900.005 Geography & Travel
 900.004 Asian History
 900.003 Oceanography
 900.002 Ancient History
 900.001 20th Century History
 
Tenth Floor: General Knowledge
 1000.006 New Media
 1000.005 Journalism
 1000.004 Museums
 1000.003 Encyclopedic Works
 1000.002 Almanacs
 1000.001 Libraries
 
Eleventh Floor: Philosophy
 1100.006 Love
 1100.005 Paranormal
 1100.004 Psychology
 1100.003 Philosophy
 1100.002 Ethics
 1100.001 Logic
 
Twelfth Floor: Religion
 1200.006 Ancient Religion (Mythology)
 1200.005 Native American Religion
 1200.004 Germanic Religion
 1200.003 New Age
 1200.002 African Religion
 1200.001 Eastern Religion