Hi everyone-- you may have noticed that a bunch of episodes recently disappeared from this blog & the corresponding podcast feed. Each of the disappeared episodes is included in the new Math Mutation book, which will be released in Spring 2016, and is already available for pre-order from Amazon.
Apologies to those of you who are searching for those episodes. I really wanted to keep them up on the web, but the publisher's contract requires their removal, out of fear that their free availability would hurt book sales. I tried to push back, but it's a standardized contract & there's not much wiggle room.
Note that the other episodes will remain on this site, and I will continue to release new ones (at least) monthly and post them as usual.
Thanks again for your interest, and please check out the book page on Amazon!