Dear Mary: How can I stop this bore reading his novel aloud?

Q. Is there a polite way of halting a wannabe novelist from reading his oeuvre aloud to an unwilling audience? A neighbour on the residents’ committee happened to be leaving as friends were arriving for drinks and I felt I should invite him to join us. It was all going swimmingly until he told someone he was writing a novel, and she made the mistake of pretending she would be interested in reading it.