Grail is the final book in Elizabeth Bear's Jacob's Ladder trilogy. I've posted about the previous two here and here. The first time I read the book I read the first couple of pages, then double checked I had the right book - the start is completely different from what I was expecting! (I should've been a bit more trusting, it's clear by halfway down page 3 that it's the right book ...)
I bought Elizabeth Bear's "Dust" about 3 years ago when I read it for an online book club (which has since vanished without trace so I can't even link to it). I did write about it on my own livejournal so I can link to that first impression. This is another of the backlog of book posts that I'm catching up on (the last one! I'm nearly up to date!) so again I think this'll be less in depth than I would've written had I got to it quicker.