Pity about Vercoe's "Historic Racing Cars" book-it was riddled with inaccuracies. They started before you even opened the book-the dust jacket shows (amongst other cars) a blue Lola T70 which is labelled a Lola T1!
To make matters worse many knowledgeable people such as Max Fisher and David McKinney went to great lengths to correct the errors but, alas, they wasted their time and energy. When the second edition was published it was word for word the same as the first edition.
As "Oldfart" says, the info it contains needs to be looked at very critically.