I will be very interested in your reaction to Posner. Please take a look at it and I will read Bugliosi on your recommend.
One minor detail that VB brings out in his book is one aspect of the detailed investigation into LHO by the FBI. Example: Recall that LHO took a bus from Dallas to Mexico City (if he was part of a conspiracy, it seems logical that he would have flown, but I digress). Back to the bus trip: The FBI tracked down every passenger that was on that bus and interviewed them. The ones that did remember Oswald all had a similar impression in that he was a strange character and a loner.