Posted by jon zingale on URL: http://friam.383.s1.nabble.com/Thanks-again-Marcus-tp7597319p7597323.html
Also, for a non-general public but otherwise gentle technical
introduction to toposes, here is a set of lectures with Andre Joyal.
Presently, I am finishing up part 1 of 4 and would love to chat
with any other interested parties.