These are both great books, for different reasons. Making Sense of Wine isn't going to give you specific advice about different grapes or regions, but it will give you an idea of how to approach wine -- a sense of "connoisseurship", as Kramer (the author) so brilliantly puts it. This idea of connoisseurship isn't unique to wine of course -- an understanding of music, of art, of bespoke clothing, or anything else is easily translatable to other disciplines in which a similar sensitivity and discernment is involved. I love this book, and recommend it to everyone who wants to learn more about wine.
The World Atlas of Wine is perhaps the single most valuable wine book available, whether you're a novice or a wine expert. This book covers every major wine region (and many minor ones), with a brief introductory text and, more importantly, incredible maps that are unrivalled in their detail and precision. In the regions that I know well, I can often identify individual producers' houses on these maps, they're that good. It's an indispensable book, needless to say, if you're going to further your understanding of wine.
I would highly recommend the purchase of both of those books. However, if you're just getting into wine I would recommend an introductory book to complement those two. There are tons of these on the market, and you can pick any one that you like. Essentially you're looking for a book that gives you a basic introduction to some grape varieties and wine regions. I personally like a book called The Wine Avenger, by Willie Gluckstern. I like it mostly because his tastes align with mine for the most part, so I'm a little biased, but beyond that, it's packed with great info and it's written in a very accessible and humorous style, so it's easy to digest.
If you really want to get geeky, buy the Oxford Companion to Wine. It's the grand encyclopedia of all things related to the topic, but it's, well, encyclopedia-like. I wouldn't recommend it as a beginning text. Get it only after you've read the above three books, and perhaps a few more, and if you decide you really want to become a wine nerd.