Many people, other than the authors, contribute to the making of a book, from the first person who had the bright idea of alphabetic writing through the invention of the movable type to the lumberjack who felled the trees that were pulped for printing. It is not customary to acknowledge the trees themselves, though their commitment is total.
~ Rada and Forsyth, Machine Learning
When I examine my bookshelves for the perfect book to read, I am always thankful for my books. I’ve never thought to be thankful for the trees, too.