Not nightmares per se, but sometimes reading does cause me to dream weird things. Usually related to the story. It depends on how emotionally involved in the story I get. Sometimes I just know it's going to happen as I lay my head down (self fulfilling prophecy). Also happens more oftern if I'm reading right up until I go to sleep.
When I grow up, I wanna be a Jiujitsu Turtle!

My british name, courtesy of Ninja Dog Shade Haven-Staffordshire: TRBL Hough Jewelstone Turtleneck

Its chaos a few hairs at a time. ~Minxy