Funny thing, I have been asked several times about the 'religious overtones' in the Shared Skies series.
I can honestly say that I didn't intend any!! Though as soon as a few astute readers pointed it out, it was fairly obvious - a trinity, the three worlds equating with Heaven, Hell and Earth.

It's part of the magic of writing, I think, that you discover things in your story that you hadn't consciously planned, or that your characters draw you to. We're not as in control as we like to think we are!!
Anyhow, with Book 3 due out later this year, who knows what else readers will explain to me!!
Check out https://www.facebook.com/sharedskies1/
for photos and background to Shared Skies.
X Josephine