The inevitable catchphrase of Professor River Song was the first thing which struck me when reading the Prompt. River Song, for those who don’t know, is a recurring character in the revived series of Doctor Who and like the Doctor is a Time Traveller and as a consequence the two characters meet out of sync of their respective personal timelines and consequently we are introduced to her she knows the Doctor very well and he has no idea who she is. To combat this problem River Song and the Doctor keep a diary so they can check whereabouts in their relationship they are. This is a plot point in her first (and technically pen ultimate story) where she leaves her diary behind which contains what will be the Doctor’s future and wisely he doesn’t read on.
I think I would probably do the same for a number of reasons, not at least it would spoil the surprise but it begs a major philosophical question regarding how ones future works. Would that mean your future is as sternly written as history and that free will is merely an illusion? Would reading the book influence what you are going to do through pre-empting and suggestion? What happens if there is a typo which declares a totally different action to what you did. In the Doctor Who universe once it is in a book it becomes solid fact, which is a problem if you were reading Delta and the Bannermen which at one point has the Doctor peeing over a shelf instead of peering.
But the idea which puts me off most of all is learning the fate of my friends and family. If it is Hell and High Water for them, imagine the way it would influence your behaviour around them.
No, the book of my life will stay firmly shut and probably burnt so no one else can discover my path.