Hello, wonderful people! 1. Do not hesitate to make an offer. Things are reasonably negotiable. 2. All items posted here are carefully QCed by me, and are going to be as it is shown. 3. If you want to enquire more for flaws or have any other enquiry, please leave a comment. Even if you don't buy anything, I'll be highly obliged if you just engage with the listings. 4. If you require any other textbooks, do leave a comment below. I'll try my best to arrange at 50-70% off of market price.