https://nwhyte.livejournal.com/3786061.html

A well put together story; Lethbridge-Stewart goes undercover in Wormwood Scrubs, posing as a prisoner (with rigged judicial process to put him there), and deals with an alien threat which is turning people to stone (like in the last novel, but different). As usual for this series, a solid piece of work. ( )

Another excellent entry in this series, with a dynamite idea in having the Brig go undercover in prison. The book has some great scenes with Stewart showcasing gritty resolve in the face of some rough customers in prison. This book goes far in establishing the ready-for-action character we see in the best of U.N.I.T. stories. The rest of the team gets a great side story with an intriguing mystery to solve. The way the two plots converge is cleverly constructed. ( )