Something is wrong in Aquae Sulis, Bath’s secret mirror city. The new season is starting and the Master of Ceremonies is missing. Max, an Arbiter of the Split Worlds Treaty, is assigned with the task of finding him with no one to help but a dislocated soul and a mad sorcerer. There is a witness but his memories have been bound by magical chains only the enemy can break. A rebellious woman trying to escape her family may prove to be the ally Max needs. But can she be trusted? And why does she want to give up eternal youth and the life of privilege she’s been born into?

Cat has been forced into an arranged marriage with William - a situation that comes with far more strings than even she could have anticipated, especially when she learns of his family's intentions for them both. Meanwhile, Max and the gargoyle investigate The Agency - a mysterious organisation that appears to play by its own rules - and none of them favourable to Society. Over in Mundanus, Sam has discovered something very peculiar about his wife's employer - something that could herald a change for everyone in both sides of the Split Worlds.

In love and war nothing is safe. William Iris struggles to keep the throne of Londinium whilst hated by his own court and beset by outsiders, while Cathy discovers the legacy of her former governess. But those who dare to speak out about Society are always silenced. Sometimes for good. While trying to avoid further torments from the mercurial fae, Sam finds himself getting tangled in the affairs of the Elemental Court. But an unexpected offer from the powerful and enigmatic Lord Iron turns out to be far more than Sam bargained for. Max and the gargoyle are getting closer to uncovering who is behind the murder of the Bath Chapter and the corruption in London and Max finds the gargoyle’s controversial ideas harder to ignore. Can he stay true to his sworn duty without being destroyed by his own master, whose insanity threatens to unravel them all?

"A Little Knowledge" is the long-awaited return to Emma Newman's popular Split Worlds series in which dynastic families feud across the ages, furthering the agendas of their supernatural patrons. Innocents are protected by monsters and the beautiful ones are not what they seem. The Split Worlds is an urban fantasy setting with a dash of noir, fantastical magic, evil faeries, and people just trying to drink their tea in peace.

As the Iris family consolidates their hold on Nether society, Will finds himself more powerful and yet more vulnerable than ever. His strongest supporters are gone, and his wife has left him, a fact that will destroy him if it comes out. To keep his position and to stay alive he needs to get her back, whatever the cost. Cathy has finally escaped the Nether but finds her reliance on Sam s protection chafing. When the mysterious sorceress, Bea, offers her a chance to earn true freedom, Cathy makes a deal with her. But can she and Sam work out the best way to navigate Bea s plans for the future without becoming another of her victims? Meanwhile Sam finds that good deeds bring few rewards in the Elemental Court, and that the path to saving the world from self-destruction is strewn with blood, lawyers and sleepless nights. Max and the gargoyle struggle to protect innocents as Rupert continues to be obsessed with finding Bea. As their fundamental beliefs in the way the Worlds work falters, they have to make difficult choices about where their loyalties lie. Amidst death, deceit, and the struggle for freedom, friendships are tested, families are destroyed and heroes are forged as the battle to control the Split Worlds rages on to its climatic conclusion."