Natalie Simmons follows her ex-boyfriend on a rafting trip that terrifies her, and she gets a nasty surprise when he cancels right before they're due to leave. Although reluctant, she goes alone and ends up being consoled by the guide, Evan Murphy. But Natalie ends up with a bigger souvenir of the trip than she planned for when she finds herself pregnant with Evan's baby shortly after returning home. Father Material (3), by Kimberly Van Meter, is a sweet book with interesting characters. Van Meter nicely depicts Natalie's angst over finding herself unexpectedly pregnant.