Looks like we have a winner! So, Val McDermid's fifth Karen Pirie book it is ...
I am really glad that every book I listed collected votes, though (and it was a close race between the two top contenders for quite a while) -- needless to say, I intend to get to all of them, sooner rather than later.
NOTE: Clicking on the image will take you to the actual poll. To avoid double counting, please use only the polling site to vote (i.e., don't also tell me in your comments which books you're voting for). Thank you!
To see the results, click HERE.