Books in the Neon Jezebel series

It's 1920 and millionaire playboy, Cranston Walker, is dusting off his wartime interrogator skills to find the people threatening to kidnap a progressive heiress. Back when Cranston was still in short pants, Rosamunde Syme was the stern girl who kept the boys in line. On the other side of the Great War, Cranston is a veteran interrogator living with the stigma of doing what the army trained him to do and Rosamunde is a traveling lecturer on mental health living with a target on her back for some of her "indecent" claims. When Rosamunde narrowly escapes an attempted kidnapping, Cranston is exactly the man she needs to find those responsible and prevent a second attempt. Meanwhile, Cranston is trying to rebuild his relationship with his sister, Vivienne, the acting CEO of the family's multi-national corporation. Time and the war have made them strangers, but enlisting her to help him dig for clues might be the thing to bring them closer together, even as he struggles with hlf-buried demon from the war that threatens to destroy his sanity. The investigation begins with a fascist church, leads to a mental hospital, and into the half-tamed edges of civilization, social contract, and reality as we know it. Neon Jezebel is a character-driven revival of interbellum pulp adventure that combines the wild, anything goes spirit of vintage two-fisted tales with a cast of grounded characters for a story that alternates between thrilling and cozy, leading up to an explosive finale.