That's Elly Jackson from La Roux!I know this because I just got obsessed with them. :D
Your cover art is gorgeous!!! I noticed it when you first posted it as well. It's very distinct. I think it's the impression the cover gives me that made me think it was YA, but it turns out it's for adults?
Yep, the series is for adults, but I'm strongly considering doing a spin-off for the YA market.