I'm always a bit dubious about buying self published ebooks and I know I certainly shouldn't be literally judging books by their covers, but in this instance I did. The book cover looks very well designed and I was surprised to find this was just an ebook and not a fully published novel that I could find in Waterstones!
The price of self-published novels is always attractive though and certainly helps break down the mental barrier... so I bought it. I read it. I found it was good. More than good. I wouldn't go as far as some to say it's great, but it is very good. The universe Xisto has created is believable (in sci-fi terms at least), the characters are engaging and flawed in their own ways, the dialogue between them is well written (a common flaw in most self-published works, if not in a lot of mainstream sci-fi as well - looking at you David Weber!) and the story is well thought out and rounded.
As another reviewer says, it reminds you a bit of the premise of Peter F Hamilton's Reality Dysfunction... it certainly shares elements of that... or a bit like Fifth Element, with a higher power manipulating lesser mortals to achieve their goals. So the story isn't massively original, but it certainly keeps you interested in seeing where it's all going.
I'm not sure enough of the world was fleshed out for any follow-ups, but I certainly wouldn't mind reading some more of Xisto's work based on this debut... and if it's based in the Angelhaven world, all the better.