Here's a collection of gorgeous high-magnification photos of grains of sand, taken by Dr Gary Greenberg, whose site is full of astounding macrophotography shots (check out the moon dust and discover why Katie Levinson calls it "microscopic razors that cling like packing peanuts").
If these pics excite you, check out Grain of Sand: Nature's Secret Wonder, Greenberg's very highly rated 2008 art book showcasing his work (with an introduction by Stacy Keach) (!). He's also got a book of macrofocus flower photos that looks promising.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.