This book is an excellent account of Lee Harvey Oswald and documents related to his activities up until the time of the assassination of President Kennedy. The title is a bit of a misnomer as the documents provide by the author are actually not just from the CIA, but also by various agencies of the United States government: FBI, Department of State, Office of Naval Intelligence in addition to others.
A refreshing aspect to this book is that Newman is reserved about jumping to conclusions. There is no mention of a gunman on the knoll, etc. Instead the author simply assesses whether a particular agency could have done more, dropped the ball, or exhibited gross negligence. In the 2008 addendum added to the back of the book, he does add his conclusion and thoughts about how everything played out the way it did. Again, still refreshingly, he also stipulates that he could be wrong, partly wrong, or maybe right. As a testament to this book, you can see that there are no negative reviews on Amazon from any anti-conspiracy proponents; The author's due diligence simply does not provide them an opportunity to refute his work.
Regardless, if you are just beginning in your inquiry into the assassination "Oswald And The CIA" is an excellent book with which to start. If you have already read a few other books on the assassination, this book is a must have for your collection.