Genshiken is another series that we started partway through, with volume five, so here we are backtracking a little bit to talk about it. As we have said before, Genshiken is an unapologetic look at otaku life in college. If you have seen the anime series, the first 2 volumes of the manga are almost entirely used in the first 8 or so episodes of the anime. This is where the "Seduction of the Innocent" (and if you don't get the reference, read up on your comic history or look here) of our main character Sasahara begins: being introduced to the perils of the otaku lifestyle, especially the doujinshi-loving end of it. Kasukabe is introduced with her original hard edge, being far from accepting of the otaku lifestyle but desperate to lure Kousaka into her grasp. It also shows that this series is unveiling in anything but real time, with time between chapters uncertain but certainly moving quickly. I would definitely pick this up, for no other reason than that the progress of Kasukabe's character is easiest to see with this as a reference point to show the beginning of her journey.
Genshiken vol. 1 and vol. 2 are both available from Right Stuf, Intl., an online retailer specializing in anime and manga.