emeralddodge:

Not extraordinarily so. The unreliable narrator is used to hide information from the reader, and it’s not one of my favorite narrative tools. 

However, that doesn’t mean that Jill is always correct. I suppose it’s neither here nor there at this point, but (for example) in Sentinel she told Reid to not kill Matthew because “they’d figure out it was [him.]”

Actually, the elders wouldn’t have figured it out. They’d suspect, but as you saw soon after, Reid is quite an efficient killer. He would’ve done the job quickly and cleanly. Afterwards, all Jill and Reid would’ve had to do when questioned was:

On one hand, that would’ve spared Jillian a lot of angst. On the other, who knows what the trajectory of the story would’ve been?

(I do.)