This guide is different from all the other guides I found primarily because I use only two elastic straps and have a latch.
Here's the materials list (in addition to the book and Kindle):
*Ribbon (I used the bookmark included in the hacked up book)
*Glue (Tacky Glue & hot glue)
*Thin craft foam pads
*Black acrylic paint
*Cool looking button with at least 2 holes (I used a four-hole button)
*Thin elastic straps
*Leatherworking needle (or other thicker than normal needle that can go through cardboard without breaking but still fit through button holes)
*Metal thimble (to push the needle through the book)
Here's two pics of the final product below. Now let's get started!
Step 1: Steps 1-3: Selection, Gut, & Sew
Step 2: Gut the book by cutting the pages out from the inside near the spine. Be careful not to accidentally cut through the cover while doing this like I did. Luckily for me, the cut was small and just added character to the cover. You may not be so lucky.
Step 3: Select a spot of the cover where you may sew a button which will be used as a latch the close the cover. Once the spot is selected, make sure when the cover closes the button will not be directly over the screen. The reason for this is there will be a slight bump on the inside of the cover where the button is sewn on which could cause pressure on the screen over time.
The cover will only be hard to go through with a needle on the first punctures. Therefore, puncture the holes to align with the button first without thread. Afterwards, double or triple knot the thread and sew the button on firmly.
The images are of my gutted book with the button sewn on.