Hardcover first edition, first printing. Not a book club, remainder or ex-library copy. State First Edition with "1" present in complete number line. The third volume in Riordan's amazing successful and entertaining Percy Jackson series. Light bumping at head and heel of spine panel with associated jacket crinkling. Jacket also shows some shallow folds at top edge. Copy shows light handling from having been read, but read carefully. Still a straight, square copy without the usual dedications by previous owners.