Thank you for looking! (^^) I am offering a set of books for the Professional Engineer Second Examination! They cost just under 20,000 yen including tax, so this is a great deal! They have been used and have writing, folds, stains, etc. I have not checked each page individually, but I am offering them at a lower price because of this, so please understand. m(_ _)m I want to sell them as a set, so individual sales are not possible.