The Hanging Tree recap

A teenage girl dies of an apparent overdose at a party in One Hyde Park, Knightsbridge's most expensive address, and Lady Tyburn calls in Peter Grant's debt: her daughter Olivia was at the party, and Ty wants her kept out of it. The dead girl is Christina Chorley, and the case swells from privileged teenagers dabbling in drugs into the Folly's main war. Around the investigation circles a lost manuscript said to be Isaac Newton's suppressed third Principia, peddled by the fox-like demi-monde fixer Reynard Fossman and coveted by every magical faction in London, including Lady Helena Linden-Limmer, a healer trained outside the Folly's tradition, and her daughter Caroline. Lesley May resurfaces on her new master's business, and the threads converge on the Faceless Man himself: the death, the manuscript, and the party's aftermath all touch his interests because Christina was his daughter. The book climaxes in a devastating magical battle at One Hyde Park, at the end of which the Folly finally has a name - Martin Chorley - though the man himself, and Lesley with him, escapes to fight the next book.

Previously: Met constable Peter Grant became apprentice to Thomas Nightingale, England's last sanctioned wizard, through the Covent Garden possession case - which ended with his friend Lesley May's face destroyed by the spirit that had ridden her. The jazz vampire affair then revealed the Faceless Man, a trained black magician schooled through illegal Oxford teaching, and hunting him became the Folly's long game. Lesley, accepted as the Folly's second apprentice, trained beside Peter until the Skygarden affair, in which the Faceless Man harvested the magic stored in a purpose-built tower block by having it demolished - and Lesley revealed she had turned: she tasered Peter and left with the enemy, her price apparently the repair of her ruined face. The Folly captured Varvara Sidorovna, a Soviet-trained battle magician, but the Faceless Man and Lesley remain at large. Peter has since worked a rural case in Herefordshire, recovering two abducted children from the edge of Faerie at the cost of a brief captivity there himself, and came home to something good: he and Beverley Brook, river goddess of south-west London, are now a couple. The truce Peter once brokered between the two courts of the Thames holds. His old antagonist Lady Tyburn holds his marker - a favour owed - and has not forgotten it.

A phone call yanks Peter into the world of serious money: a teenage girl is dead of an apparent drug overdose after a party in a flat at One Hyde Park, the most expensive residential address in London - and Lady Tyburn's daughter Olivia was among the partygoers. Ty calls in the favour Peter owes her, and what she wants is simple and compromising: keep Olivia out of it. The dead girl is Christina Chorley, and the case is not as simple as teenagers and pills - there are traces of magical practice around the party that make it Folly business, and Olivia's own account of the night does not hold together, as though she too is protecting someone. Peter works the case alongside DC Sahra Guleed, juggling a murder team that wants tidy answers, a goddess who expects service, and a crime scene where the residents' lawyers arrive before the forensics do. The dead girl's circle of privileged, discreetly wild friends comes into focus - private schools, absent parents, and at least one connection to the practice of magic that nobody should have had access to. Peter is left balancing his oath as a constable against his debt to Tyburn, aware that both will come due.

The case grows a second, glittering thread: a lost manuscript attributed to Isaac Newton - a suppressed third volume of the Principia, said to contain his serious work on the practice of magic - is being shopped around London's demi-monde by Reynard Fossman, a sharp-dressed, fox-like fixer who is always selling something. The book is the kind of artifact every magical faction in the city would pay or kill for, and the Folly's efforts to control its sale pull new players onto the board: Lady Helena Linden-Limmer, an elderly and formidable healer trained entirely outside the Folly's male Newtonian tradition, and her capable daughter Caroline, whose interest in the manuscript is bound up with their tradition's own history. Dealing with them forces Peter to reckon with how much British magic survived outside the official monopoly. The manuscript intrigue and the Christina Chorley investigation begin to twine: the same hidden interests are touching both, violence follows the book wherever it surfaces, and an attempted controlled handover goes loudly wrong. Worst of all, Lesley May resurfaces in the middle of it - active in London, working her new master's business, and as effective as she ever was.

The two cases collapse into one, and the one case is the Folly's war. The interests circling both the manuscript and the aftermath of Christina Chorley's death resolve into a single hidden hand: the Faceless Man's organization is running the board, cleaning up loose ends around the dead girl, manoeuvring for the Newton manuscript, and deploying Lesley May wherever finesse is required. Evidence mounts that Christina's family connects directly to the Faceless Man's own circle - that the girl whose overdose opened the book was not a bystander to his world but inside it - which would explain both the magical traces around the party and the ferocity of the cover-up. Encounters turn from investigation to combat: Peter, Guleed, and Nightingale are increasingly fighting the enemy's operatives rather than merely tracing them, with Reynard as bait, hostage, and liability by turns, and the Linden-Limmers as wild cards whose goals only partly align with the Folly's. Lady Ty's protection of Olivia keeps compromising the official inquiry from above. Everything converges back where it started - the towers of One Hyde Park - for a reckoning the Faceless Man has prepared for and the Folly has not.

The endgame is a battle. At One Hyde Park the Folly's operation against the Faceless Man's people erupts into open magical warfare - the most destructive the series has shown - tearing through the development's flats and atrium, with Peter, Guleed, and Caroline Linden-Limmer in the thick of it and Nightingale finally unleashed, demonstrating exactly why the enemy has spent years refusing to face him. Out of the wreckage comes the series' long-withheld answer: the Faceless Man is identified. He is Martin Chorley - rich, respectable, establishment to the bone, and the father of Christina Chorley, the girl whose death opened the book. Her connection to his world was blood. But the identification is the battle's only clean victory: Chorley slips the net and escapes, and Lesley May escapes with him, still bound to his service. The favour to Lady Tyburn is discharged - Olivia stays clear of prosecution, at a family cost the Thames court will be digesting for a while - and the Folly's relationship with the Linden-Limmers settles into wary mutual respect. The book closes with the hunt transformed: no longer a pursuit of a glamour and a nickname, but of a named man whose history, money, and associates can now be dug into - the work that will drive the next volume.

The Hanging Tree ends with the series' central mystery broken open: the Faceless Man has a name. He is Martin Chorley - wealthy, respectable, deeply embedded in the establishment, and the father of Christina Chorley, the girl whose death at One Hyde Park started the case. The identification comes too late to take him: the endgame erupts into open magical battle in and around the One Hyde Park development, wrecking some of the most expensive real estate in Britain, and Chorley escapes the net, as does Lesley May, who remains in his service. What changes is the nature of the hunt - the Folly is no longer chasing a glamour and a nickname but a named man with a history, associates, finances, and a traceable life, and the pursuit of Martin Chorley becomes the Folly's declared war. Along the way the Folly's world has widened: Lady Helena and Caroline Linden-Limmer demonstrate that capable magical traditions survived outside the Newtonian mainstream, and relations with them end wary but workable. Peter discharges his debt to Lady Tyburn with her daughter Olivia kept clear of prosecution and scandal, though family relations among the Thames girls are left strained. Nightingale's overwhelming display in the final battle underlines why Chorley has always avoided facing him directly. Peter ends the book intact, still with Beverley, and finally able to put a face to the enemy.