Unfortunately NOT a Bad Dream

[oatmealqueen]

Originally posted by rainmaker
. So I drove alone, having forgotten my Thomas Guide at home. My mother was raised out in the country, and she always gets along fine, but it's not genetic,

At the risk of sounding like a total idiot, and too lazy to look it up, what is a Thomas Guide?
BTW, geography is not my forte, so it sounds like something I might need.
Thanks in advance.