Red Book may refer to:

In biology and medicine:

• Red Book of Endangered Species
• Red Data Book of the Russian Federation, a list of endangered and protected species, prohibited for hunting, in Russia and most CIS states
• Statement of Fees and Allowances, adopted by the UK General medical services in 1990 and abolished in 2004
• AAP Red Book, a reference on pediatric infectious diseases

In linguistics and literary style:

• Red Book of Endangered Languages, a comprehensive list of the world's languages currently facing extinction
• The Redbook: A Manual on Legal Style (ISBN 0-314-16891-5) is a guide to the essential rules on legal writing.

In literature:

• Red Book of Hergest, a medieval Welsh manuscript
• Red Book of Westmarch, a fictional manuscript written by hobbits, a conceit of author J. R. R. Tolkien to explain the source of his stories
• Monty Python's Big Red Book, a humor book first published in 1971

In mathematics, physics, engineering, computer science:

• Red Book of Varieties and Schemes (ISBN 3-540-63293-X) is a series of lecture notes by mathematician David Mumford on the theory of schemes
• Red Book (telecommunications), the set of telecommunications Recommendations issued by the International Telecommunication Union Standardisation Sector in 1984, is referred to as the red book because of the color of its covers, as contrasted with blue book (1988) and yellow book (1980) versions of ITU-T Recommendations
• Red Book (audio CD standard), an audio CD standard (IEC 908)
• IBM Redbooks, named for their red covers, are technical how to books, written by IBM professionals
• IUPAP Red Book handbook of Symbols, Units, Nomenclature and Fundamental Constants in Physics published/revised by the SUNAMCO Commission of the International Union of Pure and Applied Physics
• NTIA Manual of Regulations and Procedures for Federal Radio Frequency Management
• OpenGL Programming Guide
• PostScript Language Reference
• Unix System Administration Handbook by Nemeth, Snyder, Seebass, and Hein is referred to as the Red Book even though the third edition has a purple cover
• Trusted Network Interpretation (The Red Book) is part of the Rainbow Series of books from the National Computer Security Center
• Red Book (ITU-T), the first publication to describe the X.400 standard in 1984
• Red Book (networking), a British computer networking protocol from the 1980s, one of the Coloured Book standards

In music:

• Red Book (Texas album), the eighth album released by Texas in 2005
• The Red Book Comics, an Australian band
• "My Little Red Book," a song by Burt Bacharach and Hal David, recorded by Manfred Mann and Love

In politics and religion:

• The Little Red Book, the pocket-size edition of Quotations From Chairman Mao Tse-Tung
• Red Book (Liberal Party of Canada), the policy platform of the Liberal Party of Canada in the 1993 election
• The Little Red Schoolbook, a book published in Denmark in 1969 espousing the theory that all adults are paper tigers, amongst other controversial (for the time) topics
• Red Books, a play about perceptions of Ellen White, co-founder of the Seventh-day Adventist Church
• The Red Book of the Peoples of the Russian Empire
• The New York Red Book, the encyclopedia of New York State government, including reference information and biographies of state politicians

In real estate:

• Red Books (landscaping), books illustrating the plans for landscape gardens by Humphry Repton
• The RICS Appraisal and Valuation Standards, commonly known as the Red Book; the professional guidelines for real estate valuers in the United Kingdom

Other:

• Redbook, a women's magazine
• A Guide Book of United States Coins by R. S. Yeoman, an overview of and pricing guide for coins from the United States and the colonies before the U.S. was formed
• "Redbooks", another name for the firefighter training manuals published by the International Fire Service Training Association (IFSTA). Historically, these books have had red covers
• Red Book (cars), an Australian table of new and used car values
• The Manager's Red Book is a standard book which Managers in the hospitality industry use as a system for organizing, planning, and communication

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