Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Masterful disclosure

Running Critical is a masterful piece of investigative journalism. It is rigourously researched and extremely well written. The author, a proven journalist, has no axe to grind. Now, 35 years on, the story as he relates it stands up well, based as it is on hundreds of exhaustive interviews with the key people involved and on the Veliotis tapes. A captivating and balanced history of a key part of the so-called Cold War, as well as a documentary of corporate personalities and tactics at the highest levels, together with straightforward and unembelished accounts of how men (no women other than secretaries and wives!) at the top levels of government and the private sector interacted in the panic-stricken rush to catch up with the USSR in the development of nuclear submarine technology.