I hadn't even noticed the christian books initially. I think you need categories (because I wouldn't want to stumble upon a christian book even by accident, sorry). To be brutally honest, I wouldn't read
any of those books once I'd spotted the christian ones - so for people like me, it could be hard to come up with a solution. I thought you were going to separate the two interests...
Also, this may be my OCD, but on the page with the
book covers, the covers should all be the same size (I know, it's picky). You can do this easily enough in most graphic packages.
The internet.
Bringing people together so they can disagree about everything since...forever. You're never going to please everyone.
You've certainly addressed (and fixed) some of the structural issue. But it's the content that's going to be an issue for so many (like me).