Hi all, I am trying to learn how to better navigate Portland, OR so that I am not having to rely on GPS in our vans (work for an ambulance in Clackamas County. They start you off doing IFT's until you have the skills and confidence to work on a 911 rig). I have checked my local libraries and 1 bookstore for a Thomas Guide map book. The stores are either out of stock, or have the books checked out. Anyone know any good links or materials to help with this navigation problem? Been using google maps, but that is not the most handy. Thanks!