Best-selling book
- WHO
- Christian Bible
- WHAT
- 5,000,000,000 unit(s) sold
- WHERE
- Not Applicable
- WHEN
- 2021
The best-selling book of all time is the Christian Bible. It is impossible to know exactly how many copies have been printed in the roughly 1,500 years since its contents were standardized, but research conducted by the British and Foreign Bible Society in 2021 suggests that the total number probably lies between 5 and 7 billion copies.