Changed the structure around a little bit. I made a main file called concentration-of-measure-notes.tex with the preamble and \input commands to include the lectures. I added a title and a dedicatory note which says that it's nased on Chatterjee's notes. So when you need to add a lecture, all you need to do is make a lecture2-<name>.tex and \input it into the main document in concentration-of-measure-notes.tex. I also added a bib file Concentration-of-measure-notes.bib