Frege's philosophy of mathematics

Volume I: Frege's Philosophy in Context Part 1. Frege's Life and Work Part 2. Frege and Other Philosophers Part 3. Frege's Epistemology and Metaphysics Volume II: Frege's Philosophy of Logic Part 4. Frege's Logic Part 5. Frege and Metalogic Part 6. Logic and Truth Part 7. Logic and Epistemology Volume III: Frege's Philosophy of Mathematics Part 8. Frege and the History and Philosophy of Mathematics Part 9. Frege's Views on Numbers and Value-Ranges Part 10. Consistency, Frege's Theorem, and Neo-Logicism Volume IV: Frege's Philosophy of Thought and Language Part 11. Frege and the Philosophy of Language Part 12. Concepts and Predication Part 13. Sinn and Bedeutung Part Fourteen: The Analysis of Thoughts