Anyone interested in grad school, especially for the PhD, should read The PhD Grind by Philip Guo. It’s very well written, contains great advice, and provides keen insights into the process.
It should, however, be read with a grain of salt. I think Guo was lucky/unlucky enough to experience both extremes of the PhD experience. His first few years were certainly more negative than my own, but I can only hope that I will have as many and as many high quality publications as Guo had by the end of his degree. Guo’s modesty gets in the way of an honest assessment of his accomplishments.
Whatever its faults, The PhD Grind is a worthwhile read for anyone interested in or currently working on a PhD, or even anyone who is curious what the experience is like.