From the reviews: "Barreira and Valls (both, Instituto Superior Tecnico, Lisbon) emphasize rigor, and have geared the book to students who are slightly more advanced than most students in first courses. ... Cumulatively, the volume includes over 160 examples, nearly 200 solved problems (about 45 percent of the text), and more than 220 exercises. Readability is enhanced by approximately 35 figures. Summing Up: Recommended. Upper-division undergraduates, graduate students, researchers/faculty, and professionals." (D. P. Turner, Choice, Vol. 50 (5), January, 2013)