That age old idiom of not judging something by the way it looks alone; not only applicable to books but in all areas of life.
Back to books…I think I tend to judge a book by its cover in those first few seconds that I see it but if I was tempted enough to pick it up to buy it I would always the blurb first and see if it sounds like something I’ll like; I wouldn’t buy or dismiss based on the cover alone. Ultimately I think the cover is there to entice..to make you pick it up but also needs to give you a hint to the book’s story.
One of my biggest error of judgements I made in terms of covers was Me Before You by Jojo Moyes.
From its pink, fluffy looking girly cover I made the assumption that this would be a typical run of the mill chick lit novel but couldn’t have been more wrong. If you haven’t read it, it has a much deeper, moral theme throughout and was a book I really enjoyed.