If you are a beginner, a hobbyist, or just someone who enjoys tinkering with electronics, you will seriously enjoy this mammoth of a book. At a very affordable price, nowhere else will you will find the most essential, and up to date information. Most importantly, this book is extremely easy to use and understand. I call this my "411" book of electronics because it has all the information that I need. Its very easy to find what a specific electronic component is, how it works, or how it's wired. This book has it all, from the basics of components and formulas, to schematic symbols and the use of test equipment; it's just an endless amount information. This is my 2nd updated edition that I have purchased over the years, and I highly recommend it to anyone who has an interest in the realm of electronics!
Update: January 2017 *** This newly updated edition has many mathematical errors! It's very frustrating to work through the example problems when there are so many mistakes. The only solution is to completely recheck your work, and correct these examples in the book with pen or pencil. I can appreciate that this book comes with so much information at an affordable price, but the many mathematical errors really take away from its value!