Please show examples/sketches of the tail. What do you mean by twisted like spring wine?

I have updated the brief and added a few photos for inspiration. I don''t mean a snake tail literally, but with about this much bend. Could even go as far as the corkscrew like look of the grapevine. (see the additional note at the end of the brief. 

Hello
Do you want an illustration or we can stock photos? and please you guarantee the project.
Regards

You may use stock photos or an illustration, but I'm not yet ready to formerly guarantee the project. However, I can assure you that I am personally committed to outsourcing a professionally designed book cover. I consider the money already spent.

Thanks for reply I try to do my best.

Congratulations in submitting a readable, intelligent and comprehensive brief.
One of the best I have seen.

Thank you. I figured I could do better than my first attempt. I am a writer after all.