Some Important Official Books:

Green Book : Official reports or publications of Italy & Iran

White Book : The official publications of Portugal, China & Germany

Blue Book : Any official report of the British government

Yellow Book : The report or publication of the French government

Orange Book : Official report of the government of Netherlands

Red Book : Book banished in a country

White Book : Official Publication of Germany, Portugal and China
White Paper : The authoritative recital of facts issued by the government stating its views on a particular matter.

Grey Book : Report of the government of Belgium and Japan
Joint Paper : The joint report of two or more than two governments