The ARRL Handbook for Radio Communications 2018 Softcover;

The Handbook: a Lifetime of Learning.
The ARRL Handbook for Radio Communications is the most widely used one-stop reference and guide to radio technology principles and practices. Since 1926, The ARRL Handbook has covered the state-of-the-art, but also emerging technologies in radio experimentation, discovery, and achievement. This fully revised 95th edition of The Handbook has been extensively updated, and includes significant new content. Each chapter has been authored and edited by experts in the subject.
For the new ham...you will be amazed at how quickly you become familiar, not only with the theory, but also with the practical aspects of radio from long waves to microwaves. For the experienced ham...you re in for a surprise and delight when you see the extent of the latest revisions. This edition is the most comprehensive revision since the 2014 edition.