The Hardy Boys 2 Books In 1 The Tower Treasure/The House on the Cliff 1980's

Vintage 1980's, The Hardy Boys 2 Books In 1 The Tower Treasure/The House on the Cliff Hardcover, good binding, no loose pages, pages are clean The covers have some wear/creases on the edges and one back cover of book has a few marks, please see pictures The outer pages around the book have some marks/spotting The 1st blank page on the "Cliff" story has a numbered pencil mark Bundle and save