I rate this highly as one of the best allround Both books for Inventors, and a good introduction to experienced amateurs to. Plenty of good illustrations and data on how to do this and indeed with comtemporary Electronics Today. So detailed data and information on components and other equipment did one always Seems to need. This edition has more in it than the last edition, Mainly dealing with digital data methology. An excellent buy, value for money ... current and up to date .. !!