I agree, it does seem a little early to be making a second edition of Lindy, but I have some excellent excuses:
First, I was not sure exactly how to do some things in LaTeX the first time around, so my ellipses were all messed up and some of my end punctuation was a little strange, all of which has now been fixed.
Second, I had not discovered how to do Creative Commons licensing through LaTeX, and now I have, so I have included that bit at the front.
Third, I had several people complain that I had not included an About the Author section, so I have now added one at the back of the book.
Fourth, many people were kind enough to send me editing suggestions, so I have now corrected a bunch of typos and whatnot.
Fifth, the original hardcover edition had my name correct everywhere but on the physical spine, which read Hill Jeremy Luke. I have corrected this too.
So, the end result is that there is now a second edition, still printed through lulu.com. Hopefully there will be quite a long time now between the second and the third.