Berlin 1871-1897.- Göttingen 1897-1910.- Zurich 1910-1921.- Freiburg 1921-1953.- A Final Word.- Zermelo's Curriculum Vitae.- Appendix Selected Original Versions.

This biography attempts to shed light on all facets of Zermelo's life and achievements. Personal and scientific aspects are kept separate as far as coherence allows, in order to enable the reader to follow the one or the other of these threads. The presentation of his work explores motivations, aims, acceptance, and influence. Selected proofs and information gleaned from unpublished notes and letters add to the analysis.