Murder from Memory — Sarah J. Mason

Dr. Holbrook was working on a top-secret project for Allingham Alloys when he was suffocated by a gas leak. His colleagues in Research and Development described him as bad-tempered, stubborn, notoriously stingy and undeniably brilliant. Now his work is left unfinished - but the case won't be left unsolved, because Detective Superintendent Trewley and Detective Sergeant Stone are about to make some deductions of their own...