I rate my books with bookmarks. If you're going to read a book again you'll need another bookmark right? so the more bookmarks the better!
Four bookmarks I'll read this book again! I only found maybe one thing I didn't like in the book.
Five bookmarks I will for sure read this again and everyone else should read it too! I couldn't find anything wrong with it.
I rate my audiobooks with headphones.
One headphone: I won't listen to this again
Two Headphones: I might listen to this again if I have nothing else to listen to.
Four Headphones: I'll listen to this audiobook again. I only found one thing wrong with this audiobook.