You took My heart(i was sleeping)

I’d like to get “you took My heart (i was sleeping)” in book form. I’ve already found out how I can get that done, but I have absolutely no idea what to do for the cover, especially the spine. I’d also like to include illustrations for 1–2 more important scenes inside the book, but I’m not really sure which scenes have fanart available in decent resolution or which moments would be worth illustrating. Could you help me with this? Especially with the cover.