From the book reviews: "Morais (Univ. of Aveiro, Portugal), Georgiev (Sofia Univ., Bulgaria), and Sproig (Freiberg Univ. of Mining and Technology, Germany) focus on properties and formulas concerning quaternionic variations on basic special functions (exponential, logarithmic, trigonometric, hyperbolic, polynomial, binomial). Additionally, a chapter on linear algebra shows something of the delicate issues arising from noncommutative scalars. ... Summing Up: Recommended. Upper-division undergraduates, faculty, and professionals/practitioners." (D. V. Feldman, Choice, Vol. 52 (5), January, 2015) "Morais, Georgiev, and Sprossig's Real Quaternionic Calculus Handbook works through the fundamental properties and formulas necessary for working with quaternions. ... there are lots of exercises throughout (with solutions), and it could be used as a text for an early graduate or advanced undergraduate course. I like it best as a self-study guide ... . you are writing a test suite for quaternion computation in a computer algebra system, this is definitely the book for you." (Bill Wood, MAA Reviews, April, 2014) "The book is structured into ten chapters followed by another one containing the solutions of the problems proposed at the end of each chapter. ... the book is quite informative and could be of great value for peoples who want to enter into and advance in the fascinating world of quaternions." (Ivailo Mladenov, zbMATH, Vol. 1297, 2014)