Book is in great condition. Binding is excellent. Clean text. Only marking is a name on first page (picture). Pretty rare. This is the Revised Second Edition Hardcover. Translated from Polish into English by Janina Smólska. Below is a description of the author from Wikipedia

Wacław Franciszek Sierpiński  (14 March 1882 – 21 October 1969) was a Polish mathematician.  He was known for contributions to set theory (research on the axiom of choice and the continuum hypothesis), number theory, theory of functions, and topology. He published over 700 papers and 50 books.