Fans of Erdnase really need to check out the MCA. Issue 180 of Magicol will be dedicated to the book and the identity of its author. I think non-members will be able to buy the issue, but you might as well join this terrific organization. You'll probably have to pick up #180 as a back issue, but why not join? $40 for this great quarterly magazine is a bargain!
There will also be a limited edition book on the subject of Erdnase published soon that you will want to check out. Its all available at http://www.magicana.com/mca/index.php?vSec=abo