Going Dark - Ann Christy

Going Dark is the first novel in the Silo 49 series. This book is free for the kindle. I recommend reading Wool first, as the Silo 49 series takes place in the Wool universe.

Graham Newton is the head of IT for Silo 49 and the only one who knows the truth. Silo 49 is failing, but that's not the whole truth. Graham knows why Silo 49 is failing, and just how desperate things are. Then he overhears a conversation in Silo One and things get even worse. You really should read Wool before this book, but it's free too. Both are great stories. Highly recommended.