The Sun, Our Star (The Harvard books on astronomy)

NOTICEABLY READ/USED.CLEAN & INTACT PAGES.AVERAGE WEAR TO COVER(MAY HAVE SPINE CREASES),PAGES AND /OR SPINE,BUT NO MISSING PAGES OR ANYTHING THAT WOULD COMPROMISE THE LEGIBILITY OR UNDERSTANDINGOF THE TEXT.( LIBRARY BOOK HAS STAMPING AND STICKER INSIDE OF IT OR/AND ON RIM, CREASING AND EDGING ON COVER)