These books were distributed to my child in high school. Level 3... Chemical Secret Level 4... Dr. Jekyll and Mr. Hyde, The Thirty-Nine Steps There is underlining on the first page of Chemical Secret. Please consider this as a bonus. I have looked through the books three times, and as far as I can tell, there are no other markings or stains, but I may have missed something. The covers have some scratches and discoloration. Please understand that these books have been used by my child. I will also be listing similar books from MACMILLAN and PEARSON, so if you would like to purchase them separately or combined, please comment. I will relist them as a dedicated listing. If you have any other questions, please feel free to comment.