* For the life of me, I can't remember either the title or the author of a scifi short story and I'd really like to find a copy of the book.
However, I do remember the basics of the plot. In the future a group of people travel back in time to "fix" the future. However, so as to not disrupt the space-time continuum, they do as little as possible to get their desired result. So for example, rather than killing a future enemy before he rises to power, they simply move a book on a bookshelf, or switch a personal item for another, knowing that this will be enough.