My favorite thing about Goodreads is the progress graph, which shows page count on the y-axis and date on the x-axis. If you remember to update frequently enough, you get a pretty good picture of the changes in your level of interest in a book as it goes along. The graph below shows my progress through Tao Lin's Taipei, which I finished today. You'll notice that my pace increased after page 152. This is the point in the book immediately after the marriage occurs, resulting in an increased narrative momentum (or what I might have imagined as such).