Best selling book of non-fiction
Who
The Bible
What
5000000000 unit(s) sold
Where
When
Although it is impossible to obtain exact figures, there is little doubt that the Bible is the worlds best-selling and most widely distributed book. A survey by the Bible Society concluded that around 2.5 billion copies were printed between 1815 and 1975, but more recent estimates put the number at more than 5 billion. By the end of 1995, combined global sales of Today's English Version (Good News) New Testament and Bible (copyright for which is held by the Bible Societies) exceeded 17.75 million copies, and the whole Bible had been translated into 349 languages; 2123 languages have at least one book of the Bible in that language.

It has been reported that 800 million copies of the red-covered booklet Quotations from the Works of Mao Zedong (Tse-tung) were sold or distributed between June 1966, when possession became virtually mandatory in China, and September 1971, when its promoter Marshal Lin Biao died in an air crash.