Parker Pyne is a detective who appears in three Agatha Christie books: Parker Pyne Investigates, Problem at Pollensa Bay and The Regatta Mystery. His quote and sales pitch is always "Are you happy? If not consult Mr Parker Pyne, 17 Richmond Street." Most don't notice this ad, some chuckle, and read on. And just a few make their way to Mr Parker Pyne's modest office and meet the world's most unusual, baffling and intriguing detective.