A Royal Affair by Allison Montclair

Iris and Gwen, owners of the Right Sort Marriage Bureau, are asked by Gwen's cousin, Lady Matheson, to investigate a possible blackmail plot against the royal family. It looks like an engagement is imminent between Princess Elizabeth and Prince Philip, and there appears to be someone who has damaging information on the Prince's family that could stop the marriage from occurring. In their effort to discover the truth, Iris and Gwen find themselves embroiled with British intelligence, the Greek community in London and others whose motives are not clear. A Royal Affair is the second book in the delightful Sparks and Bainbridge series. Don't miss it if you like mysteries full of witty dialogue and heart. It will be published in June.