Good news for patient Wing Commander eBook readers: the ebook re-release of Wing Commander: End Run (Book #2) is still in the works. In response to an inquiry, Baen replied via Twitter:
It's in process, but I don't have a date as yet. We have to work it into the schedule, but keep checking the bundles!
Baen has re-released the rest of the series as ebooks over the past year, with End Run conspiciously absent. It turns out the problem was not legal wrangling or anything else of the sort... Baen's current staff simply did not know the book existed! During the End Run shortage of the late 1990s, they gave away every physical copy they had on hand and so when they returned to the archive to begin producing ebook versions it was skipped (the fact that the fourth and fifth books are adaptations, respectively, of Wing Commander 3 and 4 surely confused matters further.)
It's not clear when End Run will be available, as it will be used to fill a future hole in Baen's schedule (the same process that lead to the release of the other books.) Baen announces their schedules several months in advance, which means that the earliest window for finally making End Run available again is September. Once the release date is locked down, we'll let you know!