Detective London black: Davandavu and you?

You are brilliant brilliant detective London black you are invited mysteriously to the rich philanthropist Mars de Davandavu dinner party. As you arrive eight other guests come soon after each one more exotic than the last soon after everyone's arrived Party begins you continue throughout the night meeting each of the various guests until it is soon discovered your illustrious host Mars de devandavu has been murdered in his own home it is up to you to solve this bizarre case.