There are hundreds of such books, by Western as well as Chinese authors, all addressing one desire: Is there a path linking or bridging the gap between the known world and the unknown world?
而找到這條路之後，是否人世間所有苦惱煩憂，包括身體的病痛、心裡的愁煩、生活的種種不順即可迎刃而解？