One of the things I donated to the NLR Friends of Animals Auction was a custom folded book. This was a book I would fold from a photo of the customer's choice. A sweet woman wanted to have a book folded of a photo of her sweet rescue dog named Gracie who had recently crossed the rainbow bridge. Here is the photo she gave me.
here is the cover of the book. I found some awesome "rainbow bridge" dog memorial papers on Etsy at Vizual Storm.
Here is the actual folding.
The book I used happen to a crossword puzzle dictionary. I went through the book and chose 7 different words to describe a dog. I found "Faithful", "Friend", "Gentle", "Love", etc. and highlighted each word in order of the rainbow colors. I let the customer know she could thumb through the book and find the words. She seemed to love it.