Molly Discovers Magic (Then Wants to Un-Discover It) — Megan Atwood

Molly's having a string of good luck, while nothing is going right for her cross-country pen pal, Olive. The only explanation? There's MAGIC at work, and Molly's determined to get to the root of it and set the friendship back on track.  A variety of types of correspondence and points-of-view that alternate from chapter to chapter offer a well-rounded look at the main characters and the joys and challenges of a long-distance friendship.