Apparently, Kirsten Raymonde is a main character? This is likely a fault of my reading attention, but it didn’t become clear to me that Kirsten was even “a” main character until Tyler dies.

It may not seem so (based on my above comment) but this was a page-turner for me. I was equally lost and engaged in the story, which is probably part of the allure; more gaps in the story for my mind to seek bridges for.