"Principles of Fracture Mechanics" is the most concise yet complete survey on the equations and history of fracture mechanics I have found. Professor Sanford does an excellent job explaining how complex analysis is used to derive many of the equations governing the fracture of metals, without bogging the reader down in the mathematical details. I found the book to be enlightening. After reading it, I also found myself wishing I could have taken a course in fracture mechanics from Professor Sanford when I was in college.