I always read the ending of a book after I've read about two chapters into the story. I like knowing the ending, and in no way does it ruin the whole book for me. For me, the fun is getting to the ending and finding out how they wound up there.
In writing, I almost always know how I'm going to end a story when I start it. Sometimes, it changes, but more often than not, it's almost exactly how I envisioned it.
Is anyone else this way?
Author Louis De Bernières gives away not just the story's overall ending, but lets readers know about the fate of many characters. From the beginning of,
Birds Without Wings, he makes no secret about the ultimate death of a main character.
In the novel I'm now reading,
Corelli's Mandolin, set on an occupied Greek island in WW II, he includes a vignette about the town's fat, indulgent priest who, after the occupation, becomes a skinny patriot, walking all over the island denouncing the Germans and Italians. At the conclusion he notes that had the priest lived, he might have become a saint.
You might want to take a look at some of De Bernières writing, if not for the storytelling, which I enjoy, then to see how he lets readers know about the future. One thing I noticed is that he never gives the full story. In the example above, readers only know the priest dies. In "Wings" readers don't learn how the MC dies until the moment it happens near the end of the book.
Bayou Bill