I don't get how these publishers decide what they're going to release in digital form, particuarly in the case of series. You can get the second half of The Belgariad, but not the first? They've e-published all volumes of the Venus Prime series except for the final one (and since it seems to have been a few years, it's unlikely the last one is pending)? Or if you're interested in starting the Dresden Files (which I've contemplated) you can get the first book, then have to skip books 2 and 3, but after that the series resumes?
It's odd