"Corless and Fillion have clearly dedicated several years of their lives to this book. It has been worth it! The result is a carefully judged all-round numerical analysis textbook that expertly serves students and instructors. The book stands out in a crowded market. It is a textbook that numerical analysis can be very proud of." (Alex Townsend, SIAM Review, Vol. 58 (4), December, 2016) "This book is intended to be a graduate introduction to numerical methods from the perspective of backward error analysis. ... it is the variety of topics and case studies, both theoretical and numerical, presented in the book that is its strongest point, making it a valuable reference work for students and professionals ... ." (Justin Steven C. Prentice, Mathematical Reviews, January, 2015) "This textbook provides a very readable and comprehensive graduate-level introduction to numerical methods and their analysis. ... The textbook contains many references, exercises, MATLAB codes, and numerical illustrations. It is written in a style that is both informal and informative which makes this book unique in fact." (Robert Plato, zbMATH, Vol. 1295, 2014)