I once tried reading an Elizabeth George and bounced off it for much the same reasons, although because it was only one book and the upper class characters were tied into a lot of Lynley's backstory (it was much later in the series), I didn't know if I was being fair or not with no context. I know people who rate the TV series highly (Havers and Lynley are well cast etc), but I couldn't quite get into that either when I tried an episode (although that's not to say that they might not have handled things better!)

I'm not quite sure what's she's doing though, and having only read the one book, I might still be being unfair. But you're not alone anyway!

So glad you enjoyed Roger Ackroyd and had got this far without the world spoilering you first. That's pretty cool. <3