Because the language is dense and poetic, reading a poor-quality PDF ruins the experience. You need a clean layout to follow the shifting margins, italics, and text breaks that Sumanjaya uses as artistic tools.
The "better useful essay" regarding this book focuses on how Djaya uses Anwar's life to explore themes of individual freedom and national identity. Artistic Rebellion : Chairil Anwar’s famous line, "Aku ini binatang jalang"