I saw a video on the Harbinger a couple of years ago. Very interesting.
I guess we will see if it all comes true.
This video message from Cahn is not specifially about his book The Harbinger, although he briefly mentions America's race towards immorality and judgment these last few years.
Rabbi Cahn's message here is more timely, and is specifically for the dark days we now found ourselves.
I encourage you to watch it. Take care.