A Power Unbound by Freya Marske

Secrets! Magic! Enemies to . . . something more? Set in an alternative Edwardian England, A Power Unbound is the steamy, spellbinding conclusion to The Last Binding trilogy by Freya Marske.
 
Jack Alston - Lord Hawthorn - would love a nice, safe, comfortable life. He renounced magic after the death of his twin sister. But with the threat of a dangerous ritual risking every magician in Britain, he's drawn reluctantly back into that world. Now Jack is living in a bizarre puzzle-box of a magical London townhouse, helping its owner Violet track down the final piece of the Last Contract before their enemies can do the same.
And to make matters worse, they need the help of writer and thief Alan Ross. Cagey and argumentative, Alan is only in this for the money. He's loud in his hatred of the aristocracy and their unearned power . . . and unfortunately, he happens to be everything that Jack wants in one gorgeous, infuriating package.
 
When a plot to seize unimaginable magic power comes to a head on Jack's own family estate, Jack, Alan and their allies will become entangled in a night of champagne, secrets and bloody sacrifice - and the foundations of magic in Britain might be torn up by the roots before the end.
 
Filled with magic, murder and romance, A Power Unbound is the thrilling third book in The Last Binding trilogy (A Marvellous Light, A Restless Truth) by Freya Marske.
 
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'Stunning - the writing is lush, the world-building is fascinating, and the romance is searing hot. I am completely obsessed with this story of unrepentantly dangerous people falling in love with one another.' - Cat Sebastian, author of The Queer Principles of Kit Webb
 
'Showstopping . . . Marske again demonstrates her talent for balancing romance and fantasy action. This does the series proud.' - Publishers Weekly