This is the official textbook for the Manner Protocol Certification Exam. I am selling this because I passed the exam using this material. Instant purchase is OK. There are pencil markings that I erased, but there may be some that I missed. Also, pencil markings that overlapped with the highlighter could not be erased. Please be aware of this. There are quite a few highlighter marks. Please check the photos. Please understand that this is a used item, so those who are nervous or seek perfection should refrain from purchasing. Please feel free to comment if you have any questions or would like additional photos. Please consider purchasing after agreeing to the above.