Kingdom Come by Mark Collington
In the distant future, the world has been reconstructed into the Realms, controlled by a mysterious unseen entity called Kingdom. Jasper Montague-Smythe, a private detective in the 1930s L.A. Realm, is struggling with a stack of clients and a growing caseload. As he juggles disappearances, blackmail, kidnapping, and murder, he also finds himself custodian of a woman who doesn’t belong in his Realm. Drugged and confused, she needs his help. Can he afford to take the time? Can he really afford not to? Yet an even larger problem looms: Kingdom’s Enforcers have started disappearing.