We’ve covered a few ways to make ebooks for Playstation portables (PSP) and now there are some sites popping up that offer books for download specifically formatted for your PSP screen. Unfortunately it some of these aren’t public domain. I really think there’s a market for ebooks on UMD and memorysticks, provided there were some somftware intelligence for font sizing, bookmarking and perhaps audio versions as well. Why not sell gamer guides for the PSP… Link.