Prior to Newton, fewer than half a dozen astronomers accepted Kepler’s three laws. Galileo was typical in ignoring everything Kepler did. Yet this beautiful book is an exception: it clearly demonstrated that Kepler’s laws were more accurate than anything that had come before. It was written by Maria Cunitz, one of the first astronomers to adopt Kepler’s astronomy. Cunitz recast Kepler’s planetary predictions into a form equally accurate but much more convenient and easy to use. Kepler’s tables may have been cumbersome to use, but these were not. Cunitz made Kepler’s achievement easy to grasp. In an age when women were not admitted to European universities, Cunitz became one of the most accomplished mathematical astronomers of her generation.