Yeah if Operation Paperclip is your particular interest then I would say start with Simpson and then move on to Kinzer. There have also been some books written

Yeah if Operation Paperclip is your particular interest then I would say start with Simpson and then move on to Kinzer. There have also been some books written specifically about Sullivan & Cromwell, which was the investment banking firm where the Dulles Brothers worked and established financial ties to the Nazis, but I haven't read any of them.