I took my time reading this, which made it possible for me to absorb all the detail. I love Science Fiction, and I love the concept of a different people living among us. Who know... maybe they are already here?
Kudos for the imagination you showed with this, buddy. It's a well thought out endeavor, and I thoroughly got lost in it. I'm sure readers will be calling for an expansion... so many possibilities are within this fine piece of work. I see much is 'hidden' within that brain of yours. Cheers!