Don't you love it when you pick up a book, read the back cover, think it sounds sooooo interesting, buy it, start reading it, and discover during the second chapter that you've already read it?  Just did that with Charles Todd's Watchers of Time.  But the good news is, that after age 50, your memory dims just enough to forget how the book turns out....so I'm still reading and enjoying it!!  Another perk for the "over 50" phase of my life.