For over two decades, has been a household name for engineering students in India, particularly those pursuing a Bachelor of Technology (B.Tech) in Electronics and Communication Engineering (ECE). The book, officially titled "Electronic and Communication Engineering: For U.P.S.C. (Engg. Services) & GATE," is often referred to simply as the "JB Gupta ECE Bible."

If you are an engineering student or a GATE/IES aspirant looking for this book, here is the breakdown of why it is legendary, its pros and cons, and a warning about the PDF format.