Jess Bridges Mystery Books in Order

The Jess Bridges Mystery books put a chaotic Oxford private investigator together with a buttoned up detective inspector and then drop them into some very dark cases. Jess Bridges specialises in missing persons and trouble; Leo George wears sharp suits and believes in doing things by the book. They meet over a body in the Thames and spend the rest of the series circling each other, trading dry jokes and uncomfortable truths while they chase killers.

In Black River, bodies begin turning up at wild swimming spots on the upper reaches of the River Thames. Jess, who likes midnight swims and questionable decisions, literally bumps into one of the victims. Leo is leading the murder inquiry, and reluctantly realises he needs Jess's local knowledge and instincts. Their search leads to author Jago Jackson, whose fashionable guide to secret swim locations may be inspiring the murders, and to a case that touches on online fame, old abuse and the risks people take to reinvent themselves.

White Horse takes the pair to the chalk hills near Uffington, where the outline of an ancient white horse has been carved into the downs. A young woman is found dead there in a scene staged to look ritualistic. Leo suspects links to a closed, charismatic commune called the Children of the White Horse. Only later does he discover that Jess is already inside the group on an undercover job, trying to pull a runaway back out. The investigation threads together cult dynamics, rural isolation and the limits of how far you can go to save someone who does not want to leave.

In Red House, a Russian businessman is found dead in the gardens of a luxurious Oxford home. Jess happens to be house sitting in the property next door, giving her a front row seat on the rivalries and long running feuds of the surrounding streets. As Leo digs into the victim's business dealings and neighbours' secrets, Jess spots patterns the police miss, but her habit of breaking rules also puts them both in the firing line. The book leans into the unease of wealthy suburbs where appearances matter more than the truth.

Grey Stones shifts the action to a country lodge in the Cotswolds, where Leo drags Jess along to a reunion with his old university friends. The weekend gathering at an exclusive club should be all champagne and nostalgia, but Jess quickly sees that the group have been testing the boundaries of their marriages and friendships for years. When the drinking and truth telling tip into violence, the remote setting turns the story into a tense closed circle mystery, with Jess as the outsider trying to untangle loyalties that go back decades.

Across the series, the tone balances sharply plotted crime with humour, a slow burn relationship and a clear sense of place, from Oxford colleges to muddy riverbanks. If you like modern whodunnits where the detectives are as messy and compelling as the cases, Jess and Leo are easy to follow from one book to the next.