L8r, g8r was the third book in the series, after TTYL and TTFN, which I both haven't read yet. If I have the time, I hope I can read them as well. 
 I thought I didn't really miss out on a lot even when I didn't read the first two books, I think. I had a good laugh, I guess. But there wasn't really too much content in it. I thought they went into details no one really wanted to hear. The Big O? Are you serious? 
 I guess maybe I'll still pick a real novel over IM style in the end.