The story started a little slow, but then I was into it. The plot line and characters were a little confusing, but as it developed I couldn’t put the book down. The detail the authors put into the story must require a great deal of research and organization. I was in Istanbul a few years ago and I recognized many of the locations mentioned in the story. I could see what they were describing.
My only request is to have an easier way to see the acronyms. After reading the series I have a pretty good handle on them, but some I still don’t readily grasp. Perhaps footnote them on the respective pages. It’s not easy to flip to the glossary while reading in the Kindle app on my iPad.