Considering it's from 50 years ago, it's in pretty good condition, so I'm going to put it up for sale. This is a supplementary booklet for sixth graders from 1975, "Flying Saucer Encyclopedia." As you can see, there is some yellowing. On the other hand, there is little soiling. There is a large fold on the lower left of the front cover, but otherwise, there are no noticeable folds.