The Colour of Murder / Julian Symons

John Wilkins was a gentle, mild-mannered man who lived a simple, predictable life. So when he met a beautiful, irresistible girl his world was turned upside down. Looking at his wife, and thinking of the girl, everything turned red before his eyes – the colour of murder. Later, his mind a blank, his only defence was that he loved his wife far too much to hurt her…