On the surface, everything seems to be running smoothly at UNIT, but there are forces underway that will change everything. When a young boy is abducted from the seaside, and a policewoman left scrawling pictures of prehistoric animals, it becomes clear that the Silurians are on the move. But, there are more players in this game than are first apparent. Someone is looking to undermine UNIT, and seize control of all of the UK's secret organizations. What are they all up to and why?
Overall, I found this to be a very good story. It has lots of action and suspense, and it is great to see the third Doctor back in action. Yes, this book tries to tie up a lot of loose ends, including the departure of Liz Shaw and the dissolution of Brigadier Lethbridge-Stewart's marriage, so it is a more complex story than most of those presented in the television show, but that just makes it a better book.
This is an interesting story, with lots of interesting characters. If you are a fan of the third Doctor, then you will enjoy this book!