I received this book along with the same author's publication
"Avionics Troubleshooting and Repair" seeking to gain the most information on avionics. The "Avionics Troubleshooting and Repair" appears to be a newer updated version of this same book although the titles are different. This earlier edition written in 1991, is more compact in both print and overall size. If I had to pick only one it would be the author's newest title mentioned above. The text is easier to read in the newest format. If you are seeking the most knowledge on the subject then both will serve well.