I really wanted to give it 3.5 stars but not 4, so just settling down for 3.
The collection of stories, or in author's words - mysteries - looked more of a self-explanation on govt behalf than real hard-work to find out the truth. Moreover the choice of historical events seems very senseless except first and last, ie the two assassinations. There doesn't seem to be any symmetry in the writing style. Overall an ameture collection of irrevent events to brush up once history knowledge. A quick and skip read....