Option Lock is an Eighth Doctor novel based on present day Earth and revolving around a complex plot to cause nuclear destruction. Sadly the word complex means just that. Within the first few pages the amount of different plot threads raised was staggering and served only to confuse this reader. That isn't to say parts of it were not interesting, there was just so much going I struggled to keep track. You have people collapsing, a plot to kill an obviously powerful American, dodgy ruins, and enough characters to fill a rather large hall.
After a confusing start, the novel then does get better. The Doctor and Sam are made welcome at the manor house under the flimsiest of cover and spend the next few chapters investigating the ruins, some spooky painting and something called the Philosophers Stone. It soon becomes clear that all is not as it seems and one by one the plot threads do sink into place and the final half of the book is exciting and interesting. The fact it took so long to reach this excitement rather ruined the book for me.
This is a fairly standard Doctor Who adventure which will please the majority of people but be forgotten within a month.