The book is written in fragments, semi-epistolary. I struggled through the first third because it was a narrative written by a semi-literate man. (the grammar was atrocious)
I'm glad I did. Since I've started writing, I've scared myself with what my mind was able to conceive, but only on rare occasions. Horror fiction doesn't scare me as it did when I was a child--it doesn't make me look around and put the book down and hope everything is going to be okay.
I felt that way again in a couple of places while reading Some of Your Blood. Without setting off too many spoilers, let me just say the end of the book struck me like no other since I Am Legend; it was just that good.
Some of Your Blood isn't for the casual horror fan. I understand why it isn't more widely read. I'm not even sure some would consider it horror in the popular sense of the term. But if you like to think--if you like a book that makes you go back and reread some passages because of their sheer power, go for it. Be patient. This one avoids cheep scares for deeper, longer lasting discomfort. I promise that you'll think about it after you're done reading.