WOAHH HOW COULD I FORGET? THIS IS BOG ENOUGH OF A DEAL TO WARRANT A NEW POST INSTEAD OF AN EDIT SERIOUSLY! Okay, so, you basically have to read the Wool series by Hugh Howey! Its solo good. I recommend you get the Omnibus edition for Wool since its cheaper than buying each part by itself and each one is really short. The Omnibus edition is five parts and its about the size of a normal book. Anyways, read that first. Then after that, you'll probably figure it out but read the Shift series by the same author (its in the same universe as Wool) then read Dust which starts out the Silo saga which is again on the same universe. They're so good. And the fit your description perfectly. They're apocalypse and they're good. And they aren't YA. (They're not that mature but not YA) So good mang