I thoroughly enjoyed this read though the end was a bit of an anti-climax. Overall though it delivered in spades and I was glad to have had he chance to read all four ebooks. I will now see about number five. Genetically engineered children, and assorted engineered young adults infiltration all parts of society is ably matched with a plethora of baddies. All hell bent on destroying the hero Mark. Well they tried hard and it was interesting to see how persistent this objective was and the numerous ways in which he was captured, tortured and rescued in the nick of time.