Cut and Run by Fern Michaels

It’s been three months since Countess Annie de Silva slipped away from her home before dawn, leaving a cryptic note and no clue as to her destination. That’s an eternity for friends as devoted as the Sisterhood. Now they’re desperate to ensure that their founding member is alive and well, and that means tracking her down—wherever in the world she might be.
 
Myra Rutledge, Annie’s closest confidante, knows the secrets of Annie’s past, including the remote mountain in Spain where Annie spent some of the best—and worst—days of her life. Annie vowed that she’d never return to the mountain or the stunning monastery there. But the memories of the past have called her back. Now, she needs allies who are fearless, loyal, and willing to do whatever it takes to see justice done. And with the safety of one of their own on the line, the Sisterhood won’t let her down . . .