No markings, but you can see in the pictures the rips on top edge of book on the back. It does not interfere with the reading. All text intact. I recommend this website for any and all information on these books. There's a lot of sellers here (and other sites) that drastically over inflate the prices. www.threeinvestigatorsbooks.com/Greenghost.html Book 4 in the series. A green ghost oozes through the walls of a crumbling old mansion, leading The Three Investigators to an open coffin and a grinning skeleton wearing a string of priceless Chinese Ghost Pearls. When the ghost disappears--along with the pearls--the sleuths are off on their strangest case ever!

ISBN: 0394842588