The past comes back to haunt MI6 secret agent Cordelia Hemlock in this spy thriller from Sunday Times bestselling author David Mark - "Top-level espionage fiction" (Booklist Starred Review)

Cordelia Hemlock is teetering on the verge of joining MI6 when she meets the enigmatic Walt, a high-ranking member of the Secret Intelligence Service, who tells her: They won't want you to do well. They won't ever trust you. They don't trust me and I'm one of them. She takes this as a challenge rather than a warning. She wants to protect the nation. Serve Queen and country. Who would turn down such a glorious opportunity?

Fourteen years later, Cordelia is desk-bound after finishing an undercover operation and going quietly mad with boredom. So when the call comes through on the top-secret Pandora line - so-called after the locked-box the telephone is kept in - she answers it.

It's Walt. No longer officially MI6, he still inhabits the murky world of intelligence, where information always comes with a price. He tells her he has a secret to share with her - and only her. And once she knows it, nothing will ever be the same again . . .

A follow-up to the critically acclaimed psychological thriller The Mausoleum, this is a twisty, page-turning tale of friendship and divided loyalties set against the dark, forbidding landscape of the rural Borderlands.