A collection of original philosophical texts. The contents are clean, as it has only been read once. There are some minor scratches and dents on the cover. First edition: February 25, 1993 17th printing: April 21, 2014 Authors: Takeshi Yamamoto, Tomomasa Imai, Hisao Miyamoto Takashi Fujimoto, Shunsuke Kadowaki, Shigeru No'ya Tetsuya Takahashi