"The book under review consists of ten well-written chapters each devoted to a single topic, or rather a single problem. ... The book is expected to appeal to a wide audience, including graduate and advanced undergraduate students, and can indeed be used for a seminar course in which students may present the lectures. ... Each chapter contains a set of exercises and ends with illuminating historical notes." (M. Hajja, Mathematical Reviews, November, 2015) "The book under review collects a number of problems of discrete nature and with solutions utilizing continuous and analytic tools. ... the book is suitable for undergraduate students to have an excursion on some selected problems and interesting theorems, and also it is suitable for instructors to use it to introduce some good and meaningful examples." (Mehdi Hassani, zbMATH 1311.11002, 2015)