[x] The create book button should change styles when hovering
[x] After successfully creating a book, the site should redirect you to the book's show page
[x] Slight visual bug on books index: To reproduce, hover over the middle of the first book so the popup shows. Then move to the right over the popup; the popup for the next book will not appear (let me know fi you have questions about this
[x] I recommend having an image preview when choosing an image for a book (in the book creating form)