Basically, if you like Robert Littell, you'll like this book. I waited a long time to listen, fearing I'd be disappointed from some of the reviews, but I think the issue is, when someone writes a masterpiece like The Company, everything else is pale in comparison. But, on its own, The Sisters is an intriguing spy story with rich characters. It's amazing how he links events that we're all familiar with and we have the sense that we're really peeking behind the veil into the world of intrigue that doesn't make it into the newspapers.
I happened coincidentally to download this audio just before the Kennedy Assassination, so it was a very timely read/listen. Littell is a master of the LeCarre-type spycraft novel, and I thoroughly enjoyed Scott Brick's delivery of the dialogue amongst the various characters. The plot is crisp, with excellent character development, but I was hoping for a more satisfactory ending to the various intrigues than the one Littell delivers. Just the same, a worthwhile purchase.
I really liked the first half of this book. It was amusing, even funny at times.
I didn't like the second half too much. As soon as he mentioned the bar owner Rubinstein (Jack Ruby's real name), I knew the book would make references to the JFK assassination and the rest of the book would make assumptions that have nothing to do with historical facts.
Not on par with some of Littell's other works, but it's read by Brick and provides enough entertainment to carry the story. If you like Littell, you should enjoy it.