Top children's writer Dame Jacqueline Wilson says she doesn't like her books to have pink covers as it could put boys off reading them.
In interviews with several newspapers the author says she thinks boys wouldn't be as keen to read a book that's pink.
She also says that the colour could make a book seem 'sugary' even though it might cover tough issues like divorce or homelessness.
But her publishers told her that pink would make the books sell well amongst girls.
Do you judge a book by its cover?
We asked you whether you care what the cover is like on a book - or if you're more bothered about what's inside?
What type of cover would make you want to read a book? What are the best book covers you can think of - and why do you like them?
This chat page is now closed but you can read some of your comments below.
"I think that the pictures on the front cover are as important as the actual book because then you would have an idea of what happens."
Leanne, Staffordshire, England
"I read the blurb so I know whether I will enjoy the book but I still see the cover so I know what the characters look like."
Holly, Surrey, England
"I think you should look at the blurb before you decide whether to read it or not. I've read loads of books that look like they're for boys and I really enjoyed them."
Helena, Hastings, England
"When I'm looking for a good book I think the blurb is important as well as the cover."
Tia, Dewsbury, England
"If I don't like the cover I don't read it because it's mainly what it is about."
Abby, London, England
"No book should be judged by its cover, it's the story that is important. The story should be judged. It doesn't matter about the colour."
Khushi, London, England
"I do care what is on a book cover and I know I shouldn't but I think because it is the first impression we get of a book it will affect our decision to read it or not."
Charlotte, London, England
"I tend to judge a book more by its blurb, but I do think the cover is important because if the cover isn't good, I wouldn't bother reading the blurb."
Maryum, Slough, England
"Yes I always judge a book on its cover. If I don't like the cover I doubt I shall read it."
Dilayla, Enkhuizen, Netherlands
"I don't think its right to judge a book by its cover."
Sayma, Birmingham, England
"I would never judge a book by its cover, it's not about what's on the outside, it's about what's on the inside!"
Rosie, East Sussex, England
"Some books put me off 'cause the covers aren't very interesting."
Jodie, Forres, Scotland
"We think that the colour of the book cover is not that important - it's the detail in the drawings that make a book stand out. The blurb of the book is also important and it's quite often the bit that we read first. The title of the book is more important than the colour. It has to grab our attention and sound intriguing."
Auchenblae P6/7, Auchenblae, Scotland
"I don't judge a book by its cover because there are some great books with boring covers and some boring books with really nice covers. Judging books by their covers is stupid, I always read the things said about it and the blurb first."
Daisy, Middlesbrough, England
"I normally judge a book by its author. If I don't know the author I will either read the blurb or a bit inside of the book."
Alex, Ashford, England
"We think that the picture on the front of a book is important, to tell us what was in the book. We don't mind about the colour of the cover though. We also care about what the name of the book is! Our whole class are boys and we don't mind if our books are pink!"
Miss Lumb's Class, Norwich, England
"I do judge books by the cover because I always want to end up with good books."
Olivia, London, England
"I think the blurb is more important than the cover."
Josh, Sandown, Isle Of Wight