Good condition: Mastering TCP/IP Introductory Edition, 6th Edition. I bought this when it was first published and used it for studying. There are no visible stains on the pages, and the condition is as shown in the photos, but please understand that this is a used item. *Please refer to the official website for product details. *Feel free to inquire about price reductions or bulk purchases. *Will be delivered in simple packaging. *Returns and exchanges are not accepted after purchase.