don't judge a book by its cover in other words
Don't judge a book by its cover The English idiom "don't judge a book by its cover" is a metaphorical phrase which means "you shouldn't prejudge the worth or value of something by its outward appearance alone".
List of best-selling books According to Guinness World Records, the Bible is the best-selling book of all time with over 5 billion copies sold and distributed.[2] However, the Quotations from Chairman Mao Tse-tung, also known as the Little Red Book, has produced a wide array of sales and distribution figures â€” with some sources claiming over 6.5 billion printed volumes,[3] others claiming the distribution ran into the "billions,"[4] and others citing "over a billion" official volumes between 1966 and 1969 alone as well as "untold numbers of unofficial local reprints and unofficial translations."[5][6] The Qur'an is also widely reported to be one of the most printed and distributed books worldwide,[7][8][9] with billions of copies believed to be in existence. Exact print figures for these and other books may also be missing or unreliable since these kinds of books may be produced by many different and unrelated publishers, in some cases over many centuries. All books of a religious, ideological, philosophical or political nature have been excluded from this list of best-selling books for these reasons.