I’ve also been reading a lot about maps, cartography, GIS, and geography. Here are some recent reads:
GIS Fundamentals by Paul Bolstad
A great introduction to the technical aspects of GIS, spatial data, and spatial analysis.
How to Lie with Maps by Mark Monmonier
A classic book which describes how to critically think about maps.
All Over The Map blog by Betsy Mason and Greg Miller
A growing collection of beautiful and thought provoking maps.