The Raspberry Pi magazine MagPiissue 80 is an Amateur Radio Special that features articles by Dave Honess M6DNT and Rob Zwetsloot. The PDF is available Free
The amateur radio articles appear on pages 62-75:
Pictures from Space via Ham Radio - Have you ever wanted to receive a radio signal from space? It's fun and a lot easier than you might think!
What is Ham Radio?
Using Ham Radio with Raspberry Pi
Amazing Ham Radio Projects - 7 projects
Download the Free MagPi magazine issue 80 PDF - https://www.raspberrypi.org/magpi/issues/80/