1、一本有用的书用英语说：a useful book。

2、例：这是一本有用的书，况且又不贵。Its a useful book, and whats more, not an expansive one.

3、例：这是一本有用的书，而且很有趣。This is useful book and what is more, it is interesting.

4、例：那不是一本有用的书，是吗？That isnt a useful book, is it?