Maxwell's war - M J Trow

During the Whitsun half-term, Peter Maxwell agrees to act as historical adviser to a film company making a bodice-ripper on the south coast. Maxwell has a week to give the cast the vaguest resemblance to the troops ranged against Napoleon's planned invasion of 1804. Unfortunately, the director is shot dead during a skirmish on the beach. The gun that did the killing fired by one of Maxwell's ex-sixth formers earning a few bob as an extra, but it was Maxwell who gave the order to fire. 'Mad Max' must hone that razor mind of his to clear the name of his boy recruit and bring the real killer to book.