This is one of the Ladybird "Achievements" series of books and was written by F.G. Goodall with illustrations by Robert Ayton
 
It is a very informative read with, as usual, great illustrations on the accompanying pages which help bring the words to life. It explains how radio came to be, how it works and its use in society.
 
The overall condition is very, very good. This book was first published in 1968 however this particular edition robably dates from 1971.