I bought the T4A Namibia self-drive Guide on a whim after reading some of the Namibia ride reports on the forum. Wanted to start planning a route and convince my brothers that it's time we do a Nam trip together. It has a lot of information in it, stuff to see, some tips on the areas, useful contact numbers, places to stay. I think the advice by the people above are likely more useful than getting it from a book, but I'm enjoying going through the guide and happy with the money spent. Will likely buy the Botswana one later this month.