Ernst Zermelo - Collected Works/Gesammelte Werke Volume I/Band I - Set Theory, Miscellanea/Mengenlehre, Varia

From the reviews:

“Volume I covers set theory, the foundations of mathematics and pure mathematics … . The papers are presented in their original language together with English translation on the opposite page, each one preceded by an introductory note commenting on the historical background, motivations, accomplishments, and influence. … All in all, the volume is remarkable and a very welcome addition to the literature of collected papers in mathematics, of great interest also to philosophers, logicians, and historians of science.” (José Ferreirós, Metascience, April, 2011)

“The book under review is the first volume of a complete edition of the published works of Ernst Zermelo. It includes also selected correspondence and unpublished manuscripts. The edition appears in two volumes. … papers have been published in languages in which they were originally written together with parallel English translations. They are proceded by introductory notes written by experts in theappropriate fields. Those notes are a crucial part of the edition. … The volume has been published in a beautiful and careful way.” (Roman Murawski, Zentralblatt MATH, Vol. 1185, 2010)