I will second what Jack said, if you even have a slight interest in gas pumps, get the book. I have about 30 books on the hobby, a lot of them cover stuff I do not collect but they are interesting to look through plus they give you a clue about stuff you see in antique shops and shows. They can help you spot a deal or prevent you frome getting burned. Most of the books are guides, as the prices can vary a lot by the economy and condition/ location of the item.
US Air Force Retired, 1981-2007