Recently, I got a gift from Texas Instruments. It is the book "Fundamentals of Power Supply Design" by Robert A. Mammano.
Every circuit needs well regulated power supply and every hardware engineer should be familiar with power circuit design.
Though I am familiar with some power supply design issues/concepts. But, obviously, this book will give me a systematical and historical knowledge of power supply. So, I am very happy to have this book and I will spend a lot of time to study it.