I liked this book considerably. Though it is listed as an essay, it is a collection of apercus, some very brief, some several pages.
Though I don't share Zagajewski's occasional moments of spiritual awareness, his thinking--actually the book is more of a journal--constantly provokes response. In 275 pages, I have noted or made notes on fifty-four of them.
The title comes from his "no-nonsense engineer" (p 197) father's response to a question about Z's writing: "'That's slight exaggeration.' . . . I burst out laughing when I read that, it expressed his views on poetry so perfectly, so completely, really, his views on the whole strange world that had swallowed up his son. A slight exaggeration. That's what engineers think of poetry. There's nothing inherently wrong with it, the engineers think, it doesn't necessarily lead to falsehood, effeteness, aestheticism, it's guilty, above all, of exaggeration. A slight exaggeration" (pp 197-98).
Comments will send me back to Milosz, Brodsky, Musil's essays, Cioran, Simone Weil, all of whom have pride of place in my library. Also, I want to listen to Brahms's "Rhapsody," op. 53 (p 204 and elsewhere), given a reference to William Styron's Darkness Visible and other comments.
The book contains a variety of riches, comments on the art of poetry and specific poets and poems, that offer opportunities for re-reading and more focused consideration.