Awesome upcycling in the form of beautifully cut books by Issac Salazar. According to his Flickr page, Issac's tools to create the art are: "simple arithmetic", an exacto knife and time.
"I like to take a book that would otherwise end up in a landfill and turn it into art. Rarely do I use new books, unless I am commissioned to. I like to watch Planet Green, and am into alternative energy, recycling and repurposing so it's a good feeling to know my art can contribute to reducing waste."
Issac also has an Etsy store. Although nothing is currently posted, he says work will be up soon.
(all images from Issac's Flickr)