Editor’s note: In late April, we launched a bookcrossing (图书漂流) activity, inviting book lovers we had interviewed to recommend books and giving free copies to lucky readers. So far, a number of participants have finished reading the books they received and submitted reviews. Here are three of their reviews. Sci-fi writer Bao Shu recommended The Hitchhiker’s Guide to the Galaxy (《银河系搭车客指南》). What Have Philosophers Done (《哲学家们都干了些什么》) was recommended by Chen Xiaoyu, a former contestant on U Can U BB (《奇葩说》). Yu Wu Sheng Chu Zhan Fang (《于无声处绽放》) was recommended by Liu Zheng, a lawyer who used to work as a security guard at Peking University.