befb8e68_eBook_Options_for_Libraries__Source
[Name] DIY Model [Ownership] Yes [DRM-free] Depends on Distribution and Format [Copyright/License] Fair Use/First Sale [Distribution] DRM-enabled hosting software or read-only USB drives [Format] Any [Cost] Price of paper-based book, price of digitization, and price of distribution method [Examples] None yet, but presently viable [Source] 
Paper-based texts purchased and digitized by libraries, then circulated only in digital format (purchasing a single copy and circulating it in two or more formats would violate copyright)
eBook Options for Libraries
Source