From the book reviews: "This book is an excellent introduction to set theory. Dasgupta (Univ. of Detroit Mercy) promotes reader/student interaction by integrating problems throughout the text instead of just providing occasional exercise sets. ... The book contains more than 630 frequently challenging exercises that will interest both upper-division students and readers with strong mathematical backgrounds. Summing Up: Highly Recommended. Upper-division undergraduates and above." (D. P. Turner, Choice, Vol. 52 (6), February, 2015) "This undergraduate textbook provides a thorough examination of the cardinals, ordinals, and the continuum. ... This work is a good introduction and would serve for two semesters of upper undergraduate study. ... Each part ends with remarks that are a departure point for further exploration. ... The author's clear interest in the subject matter and economy of presentation makes this an effective tool for learning set theory in the lecture hall or through self-study." (Tom Schulte, MAA Reviews, November, 2014) "The present undergraduate textbook develops the core material on cardinals, ordinals, and the real line in an informal, predominantly intuitive but nevertheless concrete and rigorous manner. ... this lucidly written undergraduate set theory textbook is a welcome addition to the relevant literature, with many individual features and a remarkably high degree of thematic versatility." (Werner Kleinert, zbMATH, Vol. 1286 (2), 2014)