O'Reilly has a new book series, "Short Cuts", that is ONLY being sold in electronic form: "Whether it's a first look at a brand new technology, a quick reference, or a thorough explanation of a narrow but crucial subject, Short Cuts bring you focused information in an easy-to-use, portable package." Interestingly, this is the same strategy we applied to handling publications on the iMIS Helpsite (docs.imis.com): the User Guides are available as bound publications as before, but the narrow, topic-specific References are posted for download only, for online use, portability, and personal printing. Where we differ is that ours are free distributions, and we post in an editable format, to support site-specific modification.