From the Sunday Times bestselling author of The Goodbye Man, discover Jeffery Deaver's chilling series featuring much-loved protagonists Lincoln Rhyme and Amelia Sachs.

Someone is killing couples just as they start their lives together.

Newlyweds Lincoln Rhyme and Amelia Sachs are on the hunt . . .

The first victims, William and Anna, were collecting her engagement ring.

1.5 carat, almost flawless.

But the Promisor had other ideas for their future . . .

Their murder - and that of the diamond cutter they were visiting - is only the first of a series of macabre attacks.

The killer is hunting down any witnesses who might lead to his capture. He has promised one thing: to destroy.

But Rhyme and Sachs will do whatever it takes to break his vow.

'The best psychological thriller writer around.' The Times