"James Voelkel achieves his purpose clearly and forcefully. His scholarship is careful and sound. He has 'done his homework, ' followed where his research led him, and written a fine book. Anyone who wants to get to the bottom of Kepler's processes needs to work his way through this book, making it his own."--Curtis Wilson, St. John's College
"This book is not merely a significant contribution to our understanding of Kepler; it is arguably the most important contribution since the pioneering work of C. Wilson and E. J. Aiton in the 1960s. The technical problems in studying the highest levels of early modern astronomy have until now distracted historians from looking at the reasons Kepler wrote his most important book, the "Astronomia nova," as he did. Voelkel has finally done this, and it's about time somebody did."--Bruce Stephenson, Adler Planetarium, author of "Kepler's Physical Astronomy" (Princeton)
