This is the first single-volume edition and translation of Frege's philosophical writings to include his seminal papers as well as substantial selections from all three of his major works. It is intended to provide the essential primary texts for students of logic, metaphysics and the philosophy of language.<BR>The editor's introduction provides an overview of the development and significance of Frege's philosophy, highlighting some of the main issues of interpretation. Footnotes, appendices and other editorial material have been supplied to facilitate understanding of the works of one of the central figures in modern philosophy.