Warning. This is going to be snarky. I don't want to write negative reviews. I don't read bad books on purpose just to do that. I have respect for everybody who dares to give their literary baby wings and set it loose upon the world. But there's really bad stuff out there, and unfortunately, this is one of them, and I do write honest reviews.
I thought the last book I got through the giveaways was pretty bad...I was wrong. This is far far worse. The fact that the author fired his editor should be a warning.
This book is like a high-speed collision of three different books: one is the story of a journalist, who meets three aliens who are supposed to audit the running of Earth as a Prison planet for unripe souls or something, and who want a journalist to publish their stuff to the world afterwards. This is the better part of the book. David behaves more or less like a normal human being, and he has a sense of humour. The aliens are a bit like those in Galaxy Quest, but well, they're aliens, so that's OK.
Then there's Marlo and Vincent and Kyle, and I still haven't got the slightest idea what they're doing in this story. Marlo is probably the most gullible person in the history of Earth, she will literally believe everything you tell her (example: your kid is autistic. You are given three possibilities: genetic fuck-up, dodgy vaccines, or your son's soul wanted to come back to Earth but something went wrong. Which one do you believe?). And then proceed to tell you her entire life's story, in every single detail. Even if you're a gigantic black hitchhiker she just picked up in a disreputable corner of town...Marlo and Vincent talk mostly in endless exposition, and sound like they should be running an esoteric call-in show on daytime TV. At some point I started skipping their chapters because they're really really terrible an pointless.
Third, there's a huge branching family of guys (no women involved, apparently), who were supposed to guard the evolution of the Earth but kinda slipped a bit and caused both world wars, accidentally. Oops. They mostly talk in gloating exposition like classic Bond-villains, but unfortunately not over the top enough to be funny.
The main problem here really is the writing style. In and of itself, the story could have been fun. I actually like these giant conspiracy theories (doesn't mean I believe in them, but they're fun). If the whole book had been in David's POV, this could have been much better. Unfortunately, the other characters just talk too much, in a very unnatural way, a bit like home shopping TV hosts crossed with fortune cookies and about ten years' worth of the Fortean Times ad section and Wikipedia.
So...sorry but that's my honest opinion. I'm sorry it wasn't better.