...I will dedicate this post to directing you to something that has been on my list of 'things to get round to looking at'.
It's Irish Christian science-fiction, of course! Brought to you by Rick Sutcliffe, all the way from, er, Canada. Naturally.
Even though these stories are readily available as handy e-books, I have yet to get round to trying one, so I can't offer a proper review. (But you don't come here for the reviews, do you?)
I can however, tell you that I find the whole idea of the Interregnum intriguing - but then, I'm a sucker for alternate histories, which is precisely what the Interregnum series is. In fact, it tells the story of several alternate earths, connected by the Timestream. One of the main 'Earths' is Hibernia, otherwise known as Greater Ireland, and has a detailed alternate history plotted out here, which starts with the non-crucifixion of Christ, and ends with the Three Worlds' War in 1939 (via space flight in 1735) , where the story begins.
If anyone out there has read any of the series, I'd be interested to know what you thought. For the rest of you, well, maybe I'll have a review ready by next St Patrick's Day...