This is now my go to recommendation at work.
It has something for everyone: adventure, romance, humor, and grisly action. The premise is what WWII would have been like if women could have enlisted. Over a lot quicker from what I can tell.

This book is told from 3 female perspectives and one unknown narrator. The cast is diverse. Rio is a white farm girl from California, Rainy is a Jewish girl from a family of crooks, and Frangie is an African American girl. So on top of a war going on, these girls are dealing with gender equality, racism, religion, sexuality, death and morality. Whew. Talk about a lot on your plate at the age of 17. Even though so much was going on it was deftly crafted and left me aching for more.