That is because at the pace of coverage this version achieves, there will need to be nine or ten more volumes after this one, and if that is their intent, neither the preface nor the website promise that, nor, if they are coming, are we told what the publication schedule will be. I have no interest in waiting another 18 years before a second volume comes out. In the case of this specific title, there is an e-version, but having bought the hard copy (I do love books, to be clear), I am not willing to get an e-version for a separate purchase price. If anybody has the e-version, please comment below. Is it easy to use? Can you zoom in on the images? Are the citations hot-linked?