Trees, maps, and theorems
Effective communication for rational minds

How many copies would you like to order?

copies of Trees, maps, and theorems

96 USD per copy (84 USD when ordering eight or more)

If you received a “special order” code (for example,
when attending one of our sessions), enter it here.

Special order

How would you like the package shipped to you?

  Media Mail
6 USD for the first copy, 1.50 USD per additional one

  Priority Mail
12 USD for the first copy, 3 USD per additional one

All of us are traveling, with limited Internet access.
You can still complete your purchase, but shipping
of your order might be delayed by one day or more.