Fryguy451 reviewed The Black Prism by Brent Weeks (Lightbringer, #1) Sept. 13, 2010 Public Show rating 4 stars Gavin Guile is the Prism, the most powerful man in the world. He is high … Review of 'The Black Prism' on 'Goodreads' Show rating 4 stars Nicely Done! A rainbow run wild! :)