 Counterexamples in Topology

"Counterexamples in Topology" is a well-known book by Lynn Steen and J. Arthur Seebach Jr. published in 1970. The book is designed as a resource for students and mathematicians to illustrate a wide range of concepts in topology through counterexamples. It motivates the study of topology not only by presenting general theorems and ideas, but also by showing the importance of counterexamples that help clarify the limits of those theorems.