Compiler: Principles, Techniques, and Tools 1.2 By Kenichi Harada / Alfred V. Aho The book has yellowing and discoloration due to age, and it looks old. I stored it on the bookshelf after reading it. Please purchase only if you understand that it has been handled by someone else. Please check the condition in the images. It will be shipped with simple packaging to prevent water damage. Please feel free to comment if you have any questions!