Angelica's Grotto by Russell Hoban

An aging London art critic coping with a faltering grasp of language stumbles into the world of online pornography and becomes enthralled by a mysterious woman he encounters there, a fixation that pulls him into risky entanglements both virtual and real. As desire collides with loneliness and the indignities of age, he brushes up against criminal threats and personal betrayal while filtering everything through his love of art, searching for meaning, connection, and a way to keep living.