Hi all,

Both OC1 and OC2 include 2 textbooks and the course guide.

OC1: 2nd edition. Pencil marking on several chapters in first volume. The second volume and the course guide are BRAND NEW.
OC2: 3rd edition. All three books are brand new.

Please email me at thlsugar@gmail.com if interested! Thanks.
三月初会回国半个月，到时可以带回去。谢谢