Not for the newly-initiated, the casually-interested-in-poetry-type.
This short but useful little book (which reads more like a short thesis) assumes you have some familiarity with poetry, because it spends little to no time defining elements and nearly all of its time emphasizing the relationship between those elements. For example: end-stopped lines and syntax, iambic pentameter with diction, etc. Granted, if you're picking up a book like this, you probably already have that basic foundation and are ready to go.
So if you're able to keep up, you realize this is a gem. Poems are examined not just for their originality in diction, but, as the author puts it - their ability to allow the reader to engage in them as an active participant. To that end, good poetry becomes not about simple recitation of past events, but as something to discover. "Reading a poem" runs parallel to writing the poem itself, if the reader pays close enough attention to how (or why) the lines are split, how the trains of thought are structured, and how the sonic rhythm of diction unfolds from beginning to end.
I can also appreciate free-verse more, knowing that not all line-endings, regardless of rhyme or meter, end arbitrarily. Other factors, like the 'sonic rhythm', play a big role.
Overall, this urges you to think more precisely about poetry, by identifying the elements employed by writers in order that we feel something by the end of the poem.
And this advice is good as any: if you like the way a certain poem makes you feel, gobble up all the poetry you can by that writer.