The Sparrow. Code Name, #1

The last ten years of Mattie's life hadn't gone as planned. As soon as she was old enough, she joined the military to serve and earn a real education so that she could build a secure future for herself. That one decision changed the trajectory of her life. A year after training, her team went down in a helicopter wreck. Months later, she woke up in an underground hospital where she had undergone many surgeries.
After her recovery, she wasn't given the choice to go through a different kind of training. The only good thing about any of it was that her team was there with her, but none of them were the same as before. It took them a year to plan their escape from the hospital, but they finally succeeded. Now, seven years later, they have to live in the shadows so they aren't found and work together in secret to help those that no one else will. Jacqueline Paige's The Sparrow is a perfect introduction to another world created by her.
This series has everything we love about her writing: action, the unexpected, and characters that step off the page and become part of your world.