Review of the hardback:: 'Jardine's book is rich in epistemological and historiographical issues, bold and stimulating in its speculations and detailed in its use of evidence. It should lead to further fruitful investigation … few will deny the substantial contribution made by its author to our understanding of the origin of Kepler's advanced conceptions …' Isis

• Acknowledgements; Abbreviations of works frequently cited; Introduction; Part I. The Provenance of the Apologia: 1. The circumstances of composition; 2. Ursus' Tractacus; 3. Kepler's initial reaction to the Tractatus; 4. The scope and form of the Apologia; Part II. Apologia pro Tychone contra Ursum: 5. Text and translation of the Apologia; Part III. The Significance of the Apologia: 6. Against the sceptics; 7. The status of astronomy; 8. Historiography; 9. Final reflections; Index of names.

Review of the hardback:: 'Jardine's book is rich in epistemological and historiographical issues, bold and stimulating in its speculations and detailed in its use of evidence. It should lead to further fruitful investigation … few will deny the substantial contribution made by its author to our understanding of the origin of Kepler's advanced conceptions …' Isis

• Acknowledgements; Abbreviations of works frequently cited; Introduction; Part I. The Provenance of the Apologia: 1. The circumstances of composition; 2. Ursus' Tractacus; 3. Kepler's initial reaction to the Tractatus; 4. The scope and form of the Apologia; Part II. Apologia pro Tychone contra Ursum: 5. Text and translation of the Apologia; Part III. The Significance of the Apologia: 6. Against the sceptics; 7. The status of astronomy; 8. Historiography; 9. Final reflections; Index of names.

Review of the hardback:: 'Jardine's book is rich in epistemological and historiographical issues, bold and stimulating in its speculations and detailed in its use of evidence. It should lead to further fruitful investigation … few will deny the substantial contribution made by its author to our understanding of the origin of Kepler's advanced conceptions …' Isis

• Acknowledgements; Abbreviations of works frequently cited; Introduction; Part I. The Provenance of the Apologia: 1. The circumstances of composition; 2. Ursus' Tractacus; 3. Kepler's initial reaction to the Tractatus; 4. The scope and form of the Apologia; Part II. Apologia pro Tychone contra Ursum: 5. Text and translation of the Apologia; Part III. The Significance of the Apologia: 6. Against the sceptics; 7. The status of astronomy; 8. Historiography; 9. Final reflections; Index of names.