Book of days

"Young Cameron Vaux's mind is slipping. Memories of his wife, killed two years earlier in a car accident, are vanishing just as his dying dad predicted they would. Memories he has to remember. His father told Cameron that to save his mind he would have to find the Book of Days - a record of the past, present, and future of every soul on earth. And when an obscure clue leads Cameron to a small town in central Oregon, he realizes that dark secrets...