It is 1540 and the hottest summer of the sixteenth century. Matthew Shardlake, believing himself out of favour with Thomas Cromwell, is busy trying to maintain his legal practice and keep a low profile. But his involvement with a murder case, defending a girl accused of brutally murdering her young cousin, brings him once again into contact with the king’s chief minister – and a new assignment . . .

The secret of Greek Fire, the legendary substance with which the Byzantines destroyed the Arab navies, has been lost for centuries. Now an official of the Court of Augmentations has discovered the formula in the library of a dissolved London monastery. When Shardlake is sent to recover it, he finds the official and his alchemist brother horribly murdered – the formula has disappeared.

Now Shardlake must follow the trail of Greek Fire across Tudor London, while trying at the same time to prove his young client’s innocence. But very soon he discovers nothing is as it seems . . .

Spring, 1543. King Henry VIII is wooing Lady Catherine Parr, whom he wants for his sixth wife. But this time the object of his affections is resisting. Archbishop Cranmer and the embattled Protestant faction at court are watching keenly, for Lady Catherine is known to have reformist sympathies.

Matthew Shardlake, meanwhile, is working on the case of a teenage boy, a religious maniac locked in the Bedlam hospital for the insane. Should he be released to his parents, when his terrifying actions could lead to him being burned as a heretic?

When an old friend is horrifically murdered Shardlake promises his widow, for whom he has long had complicated feelings, to bring the killer to justice. His search leads him to both Cranmer and Catherine Parr –and with the dark prophecies of the Book of Revelation.

As London’s Bishop Bonner prepares a purge of Protestants, Shardlake, together with his assistant, Jack Barak, and his friend, Guy Malton, follows the trail of a series of horrific murders that shake them to the core, and which are already bringing frenzied talk of witchcraft and a demonic possession – for what else would the Tudor mind make of a serial killer . . .?

Summer, 1546. King Henry VIII is slowly, painfully dying. His Protestant and Catholic councillors are engaged in a final and decisive power struggle; whoever wins will control the government of Henry’s successor, eight-year-old Prince Edward. As heretics are hunted across London, and the radical Protestant Anne Askew is burned at the stake, the Catholic party focus their attack on Henry’s sixth wife, Matthew Shardlake’s old mentor, Queen Catherine Parr.

Shardlake’s investigations take him on a trail that begins among the backstreet printshops of London but leads him and Jack Barak into the dark and labyrinthine world of the politics of the royal court; a world he had sworn never to enter again. Loyalty to the Queen will drive him into a swirl of intrigue inside Whitehall Palace, where Catholic enemies and Protestant friends can be equally dangerous, and the political opportunists, who will follow the wind wherever it blows, more dangerous than either.

The theft of Queen Catherine’s book proves to be connected to the terrible death of Anne Askew, while his involvement with the Cotterstoke litigants threatens to bring Shardlake himself to the stake.