When it comes to understanding any subject, and in particular heat treating, having reference material you can trust is invaluable. Over the years we have talked with a number of extremely knowledgeable heat treaters and metallurgists and from these discussions, we have compiled the following list of our "favorites." Newer editions may exist, but exercise caution to ensure their contents are equal to or better than the originals. No heat treat library is complete without them. Let's learn more.