Whitley's World War II Cruisers is useful but needs checking

How useful is M. J. Whitley's World War II Cruisers?

It is a very good reference, but its figures should be checked because a few mathematical errors have been found and repeated.

Whitley's World War II Cruisers is a valued reference kept close at hand. Alex Clarke admits that a few mathematical errors from it entered his own C-class cruiser work because he trusted figures after finding other parts reliable. He accepts responsibility for failing to check the arithmetic. The French cruiser Emile Bertin entry illustrates the book's coverage. The recommendation remains favourable, with a specific caution about checking calculations.