Well, this booklet can be read in one day. So that's a challenge if you want it. The essay proper is not presented in a complete form. This seems an oversight, one would assume the essay in its' entirety would be printed. What little has been prohibited this text (5-7% in my estimate) seems of no greater consequence than what was included, some more names & places are mentioned.
The booklet gives the reader awareness of the time & place of Henry David Thoreau, then the life of the text independent of the man. Excellent frame-work material for the historian, more 'snapshot booklets' should be written this way. Excepting of course when the entire source material can be included, it should. A note of nervousness should be felt, as his collected works number some 20 volumes. I wouldn't want to read all that.
Better than other 'snapshot booklets', but without what could've been included.