Fans of Spruill's "Painkiller" will not be disappointed by "Before I Wake"! Amy St. Clair is the head of ER at Hudson General, and has noticed a disturbing trend of heart attack patients who should not have died! After only about 70 pages, I already had a handful of potential suspects. I thought that perhaps the further I read, that I'd find myself narrowing down the list of suspects -- but this only happened once, after an unexpected murder. Although I had my suspicions, I truly wasn't sure who or what was really causing the unexplained deaths until Amy, the heroine, found out for herself. The characters are all well-fleshed out and believable. I can really imagine what each person looks like as I read along; that, to me, is a trait of a really good writer. Not only could I see the scenes Spruill described, but every single person as well. It is a gripping novel of suspense, and very hard to put down!