Blitz

Blitz: A Novel — Daniel O'Malley
The Rook Files — Book 3
Historical Fantasy
 
Tropes: secret organization, hidden powers, reluctant hero, dual timeline, on-the-run protagonist, found family/team dynamics, supernatural mystery, government conspiracy, wartime secrets
 
Summary:
In 1940, three young women of the Checquy—Britain’s covert supernatural agency—break the rules during the Blitz, accidentally unleashing a deadly supernatural threat. Their secret actions spark a chain of events buried for decades.
In the present day, Lynette Binns, a librarian and late-blooming recruit with the power to electrify objects, becomes the prime suspect in a series of murders marked by her own abilities. With no alibi and determined to clear her name, she flees into London’s underworld while being hunted by her fellow agents.
As two timelines converge, Lyn discovers that the truth behind the murders—and her own past—rests in the covert wartime actions of the three women who came before her.