Michael I. Handel 
Leaders and Intelligence [PDF ebook] 

From a systematic point of view, all intelligence work can be studied on three levels: Acquisition, analysis, and acceptance. The author focuses on the third of these levels, studying the attitudes and behavioural patterns developed by leaders during their political careers, their willingness to consider information and ideas contrary to their own, their ability to admit mistakes and change course in the implementation of a failing policy and their capacity to cooperate.