This was put out by Brooklands, a British publishing house some years ago. It is a collection of old magazine articles, mostly road tests from American and British magazines. It does include the 1949 Frazer and 1951 HJ tests done by AUTOCAR and MOTOR, two leading British car magazines of the day. It was sold for a time by various literature vendors in the USA and I believe at present, it is out of print.
You will find little in the way of actual company history within its pages, but if you are interested in the road tests from magazines, it could be a less expensive route compared to buying the actual original magazines.