Responsive//The Wind in the Willows//Existing covers

The wind in the willows is a classic story so their is already a lot of designs out there and all have a very different take. 

k-alderson1013-dc.blogspot.com

These ones above show quite a traditional design direction. They communicate detailed illustrations with  classic type. They are decorative and have a vintage sort of style. These ones also seem as though they are aimed more at adults. 

http://nppbooks.co.uk/

These book cover designs on the other hand have a much more digital aesthetic too them. The colours are more vibrant and the type is slightly more contemporary. These ones are probably directed at younger audience.