Do you have a book on your shelves that you’ve had for decades but never got around to reading it? I’ve had Double in Trouble, a “collision” of private eyes Shell Scott and Chester Drum, since the 1960s. I’ve read plenty of Shell Scott novels and plenty of Chester Drum novels. But somehow I never got around to reading their shared novel until this week. The plot involves a Congressional Committee looking into corrupt unions. Murders occur. Shell Scott investigates in California and Chester Drum investigates in Washington, D.C. Their investigations collide and more shooting erupts. Prather and Marlowe alternate writing the chapters. I prefer the chapters written by Marlowe. If you’re looking for an unusual pairing of characters and an unusual private eye novel, Double in Trouble fits the bill.