If you buy any of these items, please come back to this list and click the "Reserve" link to mark which item(s) you purchased. This will help ensure that Mark Spindler does not get duplicate gifts.
Any math tau shirt (XL)
except the official tauday.com
Lenses for the Mere Mortal: PureScript Edition ($10)
Rosalina sweater (XL)
Reserved on Aug 04, 2025 by Koi
50 years of Combinatorics, Graph Theory, and Computing (Discrete Mathematics and Its Applications) (
Prime Curios!: The Dictionary of Prime Number Trivia ($17)
Algebraic Topology: Homology and Cohomology ($18)
"Problem-Solving Strategies" by Arthur Engel
A Topological Picturebook
A "textbook" on how to draw complicated math pictures by hand
New Horizons in Geometry
A textbook on how to get a lot of calculus answers by drawing the right pictures
