Books are great, buy all you want, I know I bought a few, but nothing beats going to a match and seeing what wins.
I'm a firm believer in both, especially if you're a total novice. A decent book, if nothing else, will get you familiar enough with the ideas and terminology to not be completely lost going to a match.
I'm not talking from personal experience from shooting, but from fishing. When I was a kid, I was obsessed with fishing. Ok, I still am. For most of the people in my area growing up "fishing" meant "trout". We had a really good warm-water fishery river but the only thing anyone fished for there was carp and catfish. It was full of largemouth bass, smallmouth bass, walleye, perch, white bass, black and white crappie, bluegill, green sunfish, bullhead, suckers, and the occasional disoriented brown trout along with carp and channel cats. The water wasn't crystal clear so everyone told me that lures wouldn't work because it was too dirty for them to see them.
No one I knew of fished for most of the species and if the got any of them as by-catch fishing for carp and cats, they would shrug it off as a stray from some other body of water (many, many miles away... it's the Utah desert after all). To learn how to target those other species the only option I really had was reading. I checked out books from the library, used my paper-route money to subscribe to a bunch of different magazines, and went through the magazine archive at our high school reading anything I could find on warm water fishing. (This was in the dark days before the interwebs.) I wasn't able to go out on the water and catch stuff immediately with my new-found knowledge, but I was able to have a starting point in terms of lures, presentation, tactics, and location. I was miles ahead of where I would have been had I tried to do it on my own by trial and error not having the option of having someone else to guide me in person.
Nothing can substitute for being able to have someone who knows their stuff walk you through the process of learning a new skill, but sometimes that isn't an option. Sometimes you don't know enough to know that you don't know. (How's that for circular logic.
)
Matt