What are some recommended books for learning modern poetry?

I found a book in the library, An Introduction to Chinese and Foreign Modern Poetry, published by the People's University of China Press and edited by Wang Jiaxin, yes, the poet who wrote On the Other Side of the Mountain. The advantage of this book is that it gives the background of the author's creation for each poem, thus solving one of the big problems I used to have in reading poems ------- due to not knowing the background of the creation and not knowing what to say. It is also worth mentioning that the editors also give their own interpretations of each poem, some of which I beg to differ with, but are still very informative overall.