Complex sentence: It is widely considered to be a classic of the genre: in her preface to the 1966 reissue of the book, Brigid Brophy describes it as one of the half dozen masterpieces of poetic prose in the world.
Split into simpler sentences: It is widely considered to be a classic of the genre. For instance, in her preface to the 1966 reissue of the book, Brigid Brophy describes it as one of the half dozen masterpieces of poetic prose in the world.