The 20th book on my Kerouac bookshelf is Jack Kerouac's Orpheus Emerged (iBooks, 2003), and the 20th sentence (in honor of today being the 20th day of the month) is:
He could always manage to conceal his feelings. (p. 19)
I don't know where this project is going, but at its conclusion -- when I pull all 31 sentences together in one place -- we'll find out. So far I have only missed one day in March -- the 1st -- so if I can keep up the daily streak we will finish on April 1. What better day to finish a silly numerology project than on April Fools' Day?