I had been looking forward to reading this book for a while, as it combines a number of things for me. Zoos are a passion obviously, as is the fantasy/sci-fi setting. China has become my home. Lastly, the author Matthew Reilly is a guilty pleasure, because his books are just so ridiculously fast-paced that I find them hilariously fun to read. That might be a slightly back-handed compliment but it is a compliment nonetheless.
If you enjoy fast-paced action thrillers then you will enjoy this book. Unlike zooboy28 I think this book is actually very similar to Jurassic Park. Or more accurately it is very similar to Jurassic World. Such that with some tweaking it could easily serve as the basis for a sequel. So if you like the JP book/films and don't mind a similar setting this book will probably please. I don't think there is enough in it about being a zoo to justify reading it if that is your only reason.
I have only three major problems with the book (because I am happy to swallow a lot of pseudoscience!). One is a plot hole right at the end that I won't explain because of spoilers. It doesn't really affect the story, but it is quite jarring when you spot it.
The second is that the dragons are hexapodal reptilians. In a setting that tries to place them within the tree of life as we know it this is kind of a huge problem.
Lastly early on there is an assertion that crocodiles are smarter than apes. This was news to me!
In terms of zoos the only significant innovation is the idea that instead of having a physical containment barrier the animals have an implant that delivers a shock when they attempt to exit the 'exhibit area' (IIRC JW also has this but I think this book predates the film). The way the book achieves this is stupid, but it could be easily achieved today using either a simple radio signal or more likely (and better) GPS. The ethics of this could be debated, but as long as it works it seems fundamentally similar to an electric fence. But obviously the potential for problems seems more significant, and there are also other issues with having no physical barrier at all between visitor and animal. Nonetheless I wouldn't be surprised to see something like this in real life in the future.
Just reading this thread or any review should give you a good idea of whether you might enjoy this book. If the answer is yes then I'm confident you won't be disappointed. On a completely arbitrary scale I gave it a 4/5.