Has a timeframe for this series ever been hinted at? I can't even begin to guess at ho, about the development and creation of the Einstein drive, takes place approximately 150 years before the main series, but I still have no idea how far ahead of contemporary times that was. I've read all but "Abaddon's Gate" so far and haven't seen anything mentioned. Anyway, it's not the least bit important to the series but I was just curious if anyone had ever seen it mentioned anywhere.