Many readers love the first book ,though there are a series of four Wimpy Kid books ,with a fifty to be published soon.
问题描述：
Many readers love the first book ,though there are a series of four Wimpy Kid books ,with a fifty to be published soon.
答
许多读者喜欢第一本书,虽然有四部威皮儿童系列丛书和将很快发表的第五部.
应该是a fifth对吗?