I didn't start getting into it until around Book 4 or 5 I think, as my friend Ryan had been reading it from the beginning and was telling me about it, so I caved and decided to start reading, but I couldn't find the first bunch ANYWHERE, so when the next book order came in, I just ordered the newest one (Can't remember if it was book 4 or 5), and then just ended up getting the first bunch later on when there was a boxset released in the Book Order of the first bunch. It required me to get a double of one or two of them, but it also got me the first 3 or 4, which I had not read up to that point.
I obviously loved them, lol.