Cart Remove item Thumbnail image Product Price Quantity Subtotal × The Joy of Abstraction: An Exploration of Math, Category Theory, and Life by Eugenia Cheng, ISBN-13: 978-1108477222 $13.90 The Joy of Abstraction: An Exploration of Math, Category Theory, and Life by Eugenia Cheng, ISBN-13: 978-1108477222 quantity $13.90 × The Singularity Is Near: When Humans Transcend Biology Ray Kurzweil, ISBN-13: 978-0670033843 $8.74 The Singularity Is Near: When Humans Transcend Biology Ray Kurzweil, ISBN-13: 978-0670033843 quantity $8.74 Coupon: Apply coupon Update cart Cart totals Subtotal $22.64 Total $22.64 Proceed to checkout