Book covers final development

Here are the book covers as a whole including a spine and a back cover. It didn't take long to develop these I think what makes them successful is having the stripe of colour run from the front along the spine and all the way across the back. this element allows the individual book form the series to be recognised by its colour code., but I want to make sure that these translate well by doing a few proofs and making some modifications from them.

Open publication - Free publishing - More book