Girl on the Run by Jane Costello

He's a real catch ...if only she could catch him up Abby Rogers has been on health kicks before - they involve eating one blueberry muffin for breakfast instead of two. But since starting her own business, after watching one too many episodes of The Apprentice, the 28-year-old's waistline has taken even more of a back seat than her long-neglected love life. When Abby is encouraged to join her sporty best friend's running club - by none other than its gorgeous new captain - she finds a mysterious compulsion to exercise. Sadly, her first session doesn't go to plan. Between the obscenely unflattering pink leggings, and the fact that her lungs feel as though they've been set on fire, she vows never to return. Then her colleague Heidi turns up at work and makes a devastating announcement, one that will change her life - and Abby's - forever.