At this point there are plenty of places online to find the kind of information in Voyages of Imagination, like the official Star Trek webiste, TrekMovie, TrekCore, the Literary Treks podcast, and the authors' personal websites, so a second volume feels kind of unnecessary. Dayton Ward, Christopher L. Bennett, John Jackson Miller, and I think possibly KRAD tend to post pretty detailed introductions for the books on their websites, and those are probably pretty close what we'd get in a second VoI. The only way I could see it working is if they find something really unique to add to it that you can't find online. The first one worked since there was a lot of information on pre-internet age books, but at this point we'd only be covering the last 15ish years, which was after most of the authors started becoming more active online.