Sometimes ''Serendipity'' coerces ''Fate'' into making sure you read a particular book. I picked ''One Hundred Days…'' off the shelf on the back of the blurb from an author of a book I haven't actually read. I confused the title of their book with one I adored. Make of that what you will, I'm going to call it a happy accident, because this is a book many of us really need to read.