Harpoon: Inside The Covert War Against Terrorism’s Money Masters, written by Nitsana Darshan-Leitner and Samuel M. Katz, is a nonfiction book that talks about a key ingredient within Israel and the United States’ behind-the-scenes war on terror.

The authors give the reader untold or at least little-known details on a very specific edge in the State of Israel’s battle against radical Islamic extremists: finding the money.

"Harpoon" was the codename given to a unit within the Institute for Intelligence and Special Operations, also known as the Mossad. While brave men and women put their lives on war's frontline everyday to protect Israelis, the equally courageous agents within "Harpoon" were tracing the money that was funding terror organizations and using covert operations to stifle the flow of cash, either with military might or through the United States legal system. This helped to disrupt much of the terror activity within the region.

Harpoon gives us a harrowing account of the men and women who worked tirelessly to ensure the success of the unit’s mission. It provides excellent background and details, not allowing the reader to waver through the entire book. You are enthralled from beginning to end as you discover a different side of the war on terror that elicited very little press.

Nitsana Darshan-Leitner is an attorney who founded and directs the Israel Law Center, Shurat Ha'Din, outside Tel Aviv. She has seen first-hand the legal ramifications of the incidents within the book. Likewise, Samuel M. Katz has researched and co-authored several books on the war on terror, including The New York Times bestseller Under Fire: The Untold Story of the Attack in Benghazi.

Harpoon is interesting and insightful. It is a deep dive into the world of espionage and covert operations that takes the reader from the streets of Israel to the finance district of New York City. One of Harpoon’s best aspects is giving us a look at the leaders inside the unit. Instead of simply reading about the incidents, we get to feel connected to the men and women who put their lives on the line in the battle against radical Islam.