The front cover blurb summarizes the book as follows: "An Islamic State prisoner in a secret Bulgarian prison has been overheard hinting that a senior CIA officer may be passing information to the Islamic State. The agency's top officials, and even the President, say the possibility is unthinkable. But John Wells and Ellis Shafer, his former boss at the agency, have reason to believe it. To prove their fears, Wells will have to reassume his former identity as a hardened jihadi, then get captured and sent to the same prison as the source..."
I enjoyed this book somewhat but was disappointed that the main story did not commence until halfway through the book. It took me over a week to read it which for me is a long time. I usually finish a book in 1 or 2 days.
The pace was slow which made it a boring book. I know that this is a minority opinion as I have read many glowing reviews of the book. It just did not do much for me.