Addison and her twin sister are nothing alike. They don't agree on anything, except one thing: Revealing the secrets of the moon. When the sisters and their friends refuse to obey the Enforcers, all of humanity is put into jeopardy as they try to strive on the moon. As they fight to undo what they've done, they learn the importance of bonds - and loyalty to those bonds - through this fight of survival.

All the friends are back together in this story, just in time for another adventure. An interrupted wedding, an attempted assassination, and many new secrets threaten to overwhelm the young heroes. Will too many secrets push friendships apart? Is this the last story before a premature death? Will forgiveness or bitterness rule? Find out in book two of The Unknown series