I found this to be an easy and enjoyable read. The plot develops suspense and interest well, and it is easy to have sympathy with the main characters, though the ending is rather over-complicated.
A slight moan - as someone with counselling training I was quite horrified by what the therapist (a minor character) says. This would have moved the story along just as well if it had been said by a non-professional character. The police also behave rather unprofessionally but hey! It's a story! If you want something with in-depth character development and realistic procedures then this isn't the book for you, but if you are looking for a fairly light adventure/thriller/mystery then give it a try. As a UK customer it cost me £1.97 and it is well worth a couple of quid.
On the technical side, several times when Heath appears, the font size goes really small, which has the rather amusing (but difficult to read)effect of the author seeming to whisper because he's in the secret service :) I don't know if that's a problem with the original or the download.
An excellent and intelligent detective story. I like it when I learn something along the way, which you do with all the technical explanations. Love the little geek speak chapter headings. You do have to have your brain in gear to read this, which makes it interesting. The characters are believable and the mystery is very good. If this was in print it could happily rub shoulders with books by well-known authors; i shall look out for more.
I didn't realise when I bought this that it's the first in a series so I found the ending disappointing, though it's actually a reasonable ending for a series.
The book is quite confusing to start with but cleverly draws you in and the confusion unwinds as you gradually learn what is happening. I won't say too much about the plot, then, as it's difficult to do so without spoilers, but it's well written and keeps you interested.
The characters, philosophy, and action do not have any great depth but it's an entertaining bit of space opera. For myself, I quite enjoyed the book but found at the end I'm not in sympathy enough with any of the characters to want to read the next book. Don't let that put you off, I'm probably not in the demographic it's aimed at (middle aged woman). Well worth it's price.