I am one of a small advanced study group. We are all Ph. D.'s in math/curriculum etc. and not having had university research careers have become "rusty" with respect to what was once "at our finger tips". We choose interesting and appropriate texts to "exercise our brains" and enjoy ourselves. We are currently working on Stewart and Tall's ANT & FLT. In the past we have read Stewart's Galois Theory and Avner Ash's Elliptic Tales. We have found your blog to be of immeasurable value.