Out of the Sun (Unabridged‪)‬

When Harry Barnett is informed that his son is in hospital in a diabetic coma, he is certain that there must be some mistake, since he does not have a son. But he soon discovers that he does. David Venning was a brilliant mathematician, and his tragic condition is taken to be the result of an accident or a suicide attempt. But his notebooks are missing, and two other fellow employees have died in suspicious circumstances. Coincidence? Or is David the victim of attempted murder?