The Lady Glass by Anneka R. Walker

Theresia Dvorak has nothing left of her parents—nothing save her dowry, a priceless crystal vase stolen and sold by her own stepmother. Theresia will do anything to secure what is rightfully hers—even assume a false identity and steal her future back. When she gains entrance to a house party and has a memorable run-in with the handsome navel captain Rolland Reese, her mission is compromised. She swore never to trust an Englishman again, but when he makes a daring proposal she cannot refuse, she must work side by side with him if either of them is to achieve their aim.

Rolland is stunned when his homecoming from the war takes a decidedly deadly turn. The quickest solution is to throw a house party and invite all the suspects. With the stakes incredibly high, Rolland must root out the killer before they turn their sights to the next potential victim: his own father. The mysterious Theresia is undoubtedly the most suspicious of his guests, but against all odds, he finds himself risking everything to protect her. As Rolland unravels a tangle of clues, he faces the greatest threats of all: a heart of fire and a future as fragile as glass.