A useful book when you are at a loss for evaluating text

In the last class, we learned how to make essays better, particularly about their structures.
As I learned before, assessing the accuracy of structure and finding unstated evidences are important to make essay clearer. However, sometimes these steps are very difficult in some text.
But actually, I do almost same things in philosophy class such as evaluating argumentation, finding assumption not mentioned, etc. And in the class, we use a textbook of critical reasoning. I think this book somewhat helps me evaluating essay in ELA, too.
We use Japanese version in the class, but original version is written in English, so I'll put both picture of the book cover.