maybe u could write and draw what u think the story is about in ur words and ways and demonstrate how the story makes u feel after reading it and before reading it when u look at the front cover and see the picture what u think the book is about.
Your asking for help on what to draw for a book cover... Damn that shit is whack..you could draw a cat and contrast it to the book "you see a cat is a very individual being just like brett in a sense" ...
--What I Learned At This Years Regional Optometry Convention