Thinks . . . , David Lodge's witty new novel about secret infidelities and the nature of consciousness, unfolds in the alternating voices of Ralph Messenger, director of the Centre for Cognitive Science at the University of Gloucester, and Helen Reed, a novelist and writer in residence at the university. Mutually attracted, the two end up in a moral standoff that is shattered by events that dramatically confirm the truth of Ralph's dictum: we can never know for certain what another person is thinking.