As a ham radio operator, I highly recommend this book!
Check out this book in the Amazon store. If you’re any sort of Prepper, whether you’re new at it or an old hand, you might want to read this and keep a copy of it on your kindle or eReader. This is only available right now in the Kindle Store and in digital format. The author tells me he is planning to come out in other reader formats later (after his contract with Kindle expires).
The book covers radio systems and communications, and discusses various “End of the World” scenarios. Even the author doesn’t believe most of them will occur (Alien invasion was one he mentions) but certainly it gets you thinking about what might be!
The link is at Amazon: Basic Survival and Communications Skills in the Aftermath