Articles / books containing GRE words?

I’m preparing to take the GRE later this year and decided to brush up on my vocabulary. I’m looking at and remembering 6000+ GRE words. I thought it would be even better to read some stuff that contains those words. The newspaper obviously is not the place - anyone know of any resources that contains more obscure words? (The content should not be technical, since I only have a background in one area of study.)