Just the other day I was thinking about starting this list. Thanks! Liked & repped.

A couple books I'd add:

A Pattern Language: Towns, Buildings, Construction
by Christopher Alexander (not strictly mapping related, but some amazing thoughts on architecture and urban design)

Mapping the Medieval City: Space, Place and Identity in Chester
by Catherine A. M. Clarke (haven't read it yet, but it's on my wish list)

Mapping the World
von: Beau Riffenburgh

The World of Ice & Fire: The Untold History of Westeros and the Game of Thrones
by George R.R. Martin, Elio Garcia, Linda Antonsson (out in October 2014, looks like it'll be packed with gorgeous maps)