Usually, I do my best not to get involved in book series that are in the process of being written. For example, I started Lord of the Rings 40 years after it had been written, just to be sure no sequels were coming. I waited to read Harry Potter until the summer that the 7th book was coming out, since by the time I finished The Half-blood Prince, The Deathly Hallows was all done and waiting for me.
I buy even less books than series I read that aren't finished. Not sure how much sense that sentence makes, but this week I did something I've never done before. I pre-ordered a book. Now I've pre-ordered the board games before, and video games, and even the LotR Blu-Ray set, but never a book. However, Inheritance, the 4th and final book of the Inheritance cycle, which I've been reading since 2004 is coming out in November. The first two books, Eragon and Eldest, I have in paper back. I bought Brisingr in hard back within the first couple weeks it was out and now I've pre-ordered the last. I'm reading Brisingr again, for a second time to get prepared for the end, and it is even better than I remember it.
So, if you like fantasy books and coming of age stories, then you should get on this boat. You are in the great place that I'm not in, you can pick up book number 1 and begin reading and by November they'll have the final book ready for you to jump into and finish about the same time everyone else does.
Also, on a side note, Eragon the movie, sucked. They really blew it with that one and I wish someone else would pick it up and do it right, invest in the story, and don't try to shorten it into a 1.5 hour fantasy romp of a movie, but make it as epic as the books and at least 2.5 hours long for each of the 4 movies that would have to be made.