19 January 2013 - Twitter @hjghassell

"Just requested this from inter-library loan.  Think it will come?"

https://twitter.com/hjghassell/status/292764813774422016

5 January 2013 - Kotaku comments

"Also a teaching book called Teaching with Calvin and Hobbes. It goes for about 10K on eBay. Rarest Calvin and Hobbes item around."

* * *

"Wow, that's crazy! I had no idea such a thing existed. Now I kind of want it..."

http://kotaku.com/calvin-and-hobbes-is-one-of-those-amazing-things-that-p-1349949

5 January 2013 - Twitter @tilmobile

"TIL a Calvin & Hobbes textbook was sold for US$10 000 in 2009."

https://twitter.com/tilmobile/status/287679620709494784