Charlie Brown book collection

Collection of five Charlie Brown books by Charles M Schulz they are in the original box. The box has been taped over the years 1968 is there a copyright date in the collection is he’s your dog, Charlie Brown, you’re in love Charlie Brown, it was a short summer, Charlie Brown, it’s the great pumpkin, Charlie Brown, and Charlie Brown’s all stars all in great condition. The box is the only thing damaged a few have names written in the front as shown in photos.