This is probably the most eye-opening book I have read in years. I see, with the trouble in the Middle East right now and the Houthes blocking some of the cargo ships at times, plus the disaster of the collapse of the Frances Scott Key Bridge in Baltimore, how easily and quickly shipping can be stopped. Also, if Trump becomes our next president (God forbid) he will/could isolate the U.S. like never before. I can easily see the scenerios that the author described in this book could all come to pass.