This book does not delve too deeply into the technology but more concerns the British Intelligence effort to find out about this new and pressing threat. Target London is written from the point of view of British intelligence prising open the Pandora's box of secret German flying bomb and rocket developments as they piece their knowledge together. It is a longish book containing lot of notes with a well written main body of text in short, palatable chunks.
We start off with the first insight when a German signal is intercepted by Bletchly Park, the British code breaking station. The signal reports a man's suicide on a military base, not information of much use in itself to the war effort but the detail of his unit and who the message was sent to provides the first inkling something important is happening by the Baltic. The book describes how disparate pieces of informatin create a more whole picture of the German programs, sometimes overestimating key factors such as the size of the warhead and in other ways underestimating.
The book also describes the deception by the British using the double cross agents, reporting to the Germans their bombs, which were actually falling in South and East London that they were falling in North West London. The Germans then believe that they are firing long and so, based on the deception information, recalibrate their weapons resulting in them firing even shorter.
Further surprises include the fact Churchill actively considered using gas on the German people in revenge for rocket attacks and the level of infighting between Government departments and the military over who really was in charge of Operation Crossbow - the war against the flying bombs and rockets.
Finally the story takes us into Germany and a brief section on how the Americans hoovered up all the technology and German scientists to operate it, an area that is covered by T-Force: The race for Nazi War Secrets, 1945
The Kindle version has photographs although the captions are obviously ripped straight from the book as they describe pictures to the left and right.