A Diamond in my Pocket by Lorena Angell
Series: The Unaltered, Book 1.
Approx. 72,210 words.
Published on May 27, 2011.
When Calli Courtnae breaks the world record for the 100-meter, she's invited to Montana to prepare for Olympic tryouts. Upon arrival, using her lip reading ability, she realizes she’s been lied to. She's actually a superhuman, a Runner, and her new world includes transporting packages for other supernatural groups. The next package is a rare magical diamond that will change Calli's life forever.