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".
The Secret (book) The Secret is a best-selling 2006 self-help book by Rhonda Byrne, based on the earlier film of the same name. It is based on the pseudoscientific[1][2] law of attraction which claims that thoughts can change the world directly. The book has sold 20 million copies worldwide and has been translated into 50 languages. It attracts much criticism and is frequently parodied.