A Final Discord — Tessa Barclay

The new Crown Prince Gregory mystery from this well-loved author - When Gregory Crowne is enlisted to help Gilles Guidon, the eccentric son of a merchant banker, to assemble a jazz quintet for the Montreux Festival, he soon discovers there is something wrong at the bank. Gilles falls in love with Morena, the sister of one of the quintet, and his ancient nurse, Nounou, dies in a mysterious fall. Then Gilles disappears with Morena, and an unusual ransom demand arrives . . .