I work with ebooks at my library. I understand how our patrons can access them, I understand how they can download them, and I understand how they can read them. I never really understood how we have them—what complicated system of money, technology, and time makes it all possible. PLA’s “Long E-Overdue” program on Saturday shed some light on this, but even more important, the session made me understand a crucial issue: How libraries have ebooks will likely (hopefully?) change before I will fully understand it how it works anyway.