Blood Secrets by Morgan L. Busse, In book 2 of the Skyworld series, Cities are on the brink of extinction as they're engulfed in the Mist, and not everyone wants the world to be saved. Theo believes he can stop mankind from Turning, but doesn't know how to alter Cass's unique blood into a cure. Cass, herself is having a hard time with the idea that she might be the savior of the world-a world she's not sure is worth saving. There is something more chasing Cass than the House of Lords or the masked man who can walk in the Mist. Will Cass be willing to use her blood to save mankind or let those who care only about themselves perish. Audiobook on CD. Recommended for ages 13 to 18 years old.