There's a new(ish) DRM scheme in town! LCP is Readium's "Licensed Content Protection". At the risk of sounding like an utter corporate stooge, I think it is a relatively inoffensive and technically interesting DRM scheme. Primarily because, once you've downloaded your DRM-infected book, you don't need to rely on an online server to unlock it. How does it work? When you buy a book, your vendor sends you a .lcpl file. This is a plain JSON file which contains some licencing information and a…