I would like to announce that "The Navigators," my contract history of NASA's deep-space navigation over the past half century, is now in print and available from Amazon. SIGCIS members will find much on the history of computing within NASA and especially JPL from the era of the IBM mainframes and the Univac 1108 to minicomputers and workstations. The lack of computing power early on, for instance, led navigators to turn their software into a kind of virtual laboratory for post-flight analysis. Computers imposed limitations on the evolution of navigation, but it also was crucial for enabling it. I focus on two broad themes. One is the beginnings and evolution of space navigation in response to the security crisis starting with World War II and running to the present century. The other overarching theme is the relationship between navigation and science, especially astronomy. The navigators, I argue, are representative of the application-oriented science that the security crisis fostered. The book makes additional points about modeling nature, the role of technology (computers, instruments), and the reasons for navigation's increasing accuracy. The book will be of interest to historians of science, space, astronomy, computers, technology, and public policy. It is a print-on-demand book at NASA's request (mainly to expedite publication). I undertook all the steps necessary to turn my manuscript into a book, including cover design, proofreading, and layout. Andrew Butrica Andrew J. Butrica, Ph.D. Research Historian Sent from my Xylo Phone