Sure go with a book, but those who learn by themselves usually have more fun and also more self experience. If you are a total noob trying to get into dh, get as much help AND experience as possible as dh is not an overnighter. Otherwise books are almost useless. My friend, on his skateboard, learned how to ollie without any help, but it took him 3 weeks. I learned the technique and it took 3 hours. But he can go higher than me. It's all bout exp.