Showing Nightshade by Andrea Cremer

She can control her pack, but not her heart ...'I wanted him to kiss me-wished he could smell the desire that I knew was pouring off me. You can't, Calla. This boy isn't the one for you.' Calla Tor has always known her destiny: graduation, marriage and then a life leading her pack. But when she defies her masters' laws to save a human boy, she must choose. Is one boy worth losing everything?