Approximately 5 Billion bibles have been sold and that makes it far and away the biggest selling book in history - http://www.guinnessworldrecords.com/world-records/best-selling-book-of-non-fiction/
Be careful which blogs you read - the author of that blog used Wikipedia as his source and we should never trust Wikipedia. The blogger pulled his data from a fiction only book sales page so the only result one could expect to receive are fictional - https://en.wikipedia.org/wiki/List_of_best-selling_books#More_than_100_million_copies
Always check your sources and trust no-one - truth!
I would estimate that over 30 billion bibles (or versions of it) have been produced since its creation.
Wikipedia is trust-able if and only if the fact has its references to good sources.
Any person can edit any article, and it could be the case that when someone reads the article, it has just been modified with any false statement. Very often people revert those changes. But it could be the case when someone is reading when anybody had reverted them.