A parlor game: write the worst blurb you can imagine for the best book you can think of. For example:
Making Light: This can't be good for one's soul: Plucky heroes travel across a fantasy world, encountering strange creatures and languages (invented by the author!) to destroy a magic artifact, while being pursued by Minions of the Dark Lord. They are aided by a King in Exile, an elven archer, and a wizard with a long beard. People sing at them a lot, occasionally in fake languages (invented by the author!). Did we mention the author made up some languages for the book?