The most relevant fixed price listing that has been used or worn previously.The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used.See details for description of any imperfections.
First published in 1996, Dava Sobel's story of an epic scientific quest - how to calculate longitude. The thorniest scientific problem of the day had occupied scientists and their patrons for the better part of two centuries until John Harrison dared to imagine a mechanical solution. The story encompasses astromy, navigation and clockmaking.