Solid State Physics, better known by its colloquial name Ashcroft and Mermin, is an introductory condensed matter physics textbook written by Neil Ashcroft and N. David Mermin. Published in 1976 by Saunders College Publishing and designed by Scott Olelius, the book has been translated into over half a dozen languages and it and its competitor, Introduction to Solid State Physics (often shortened to Kittel), are considered the standard introductory textbooks of condensed matter physics.