The world of beer can be as simple or as complicated as you'd like it to be. You can settle for grabbing a case of your favorite domestic brand each weekend and chug away -- or you can spread your wings and learn more about it.
If you're curious enough to want to learn more about beer, you might want to consider The Scratch & Sniff Guide to Beer: A Beer Lover’s Companion, which is an actual book that features actual scratch and sniff stickers to help you really understand what's going on.
Of course, to get the full value out of a book like this, you'll have to get the actual paper version, as there's no way to get the full scratch-and-sniff effect with a digital version on your tablet or smartphone. (Bristol Herald Courier)