Very engrossing. I'm almost afraid to find out the truth, whatever it is. The reader becomes the amnesiac... 
 And, I'm finished. 
 While some reviewers have pointed out some logical inconsistencies in the book, I found it to be a very well-written, compelling read. 
 Christine wakes up one morning and realizes that she has aged 20 or so years and has no memory of the past. The first part documents this day, a phone call from a Doctor that she has been seeing, reminding her to read her journal. The second part contains the journal that she has been keeping, and the third part contains the denouement. 
 I don't do well with suspense, and I found that from about halfway through, I had to put the book down and regain my balance from time to time, which is meant as a compliment to the author. But at the same time, I was desperate to find out the truth of her situation. I suspect that this tale with stick with me for some time. 
 Highly recommended.