These are set of books used by Chem 36 and 130 lab courses. The first is the Stanford University Lab Manual by Pavia required by Chem 36 and 130 in excellent condition with a little wear on the outside cover. The second is "Introduction to Spectroscopy" by Pavia et al. 3rd Edition also in good condition. Together these books are over $250 in the bookstore. My price is $125 or your best offer. Contact me with any questions.