paperback
noun [ C ] uk/ˈpeɪ.pə.bæk/ us/ˈpeɪ.pɚ.bæk/
平装书，简装本
a book with a cover made of thick paper
a best-selling paperback 一本畅销的平装书
I'll buy some paperbacks at the airport. 我要在机场买几本平装书。
It will be published in paperback (= as a paperback) in March. 这本书将于3月份以平装本形式出版。
Compare: hardcoversoftback