Sunset
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
A couple thoughts on this.
1) You may want to consider a "video autobiography", where you sit in front of a video camera and talk about your life through stories and anecdotes, etc. This could be in lieu of the book, or in addition to it. I feel that your kids, grandkids, and great-grandkids would be more captivated by this and would feel closer to you if they could see your face, hear your voice, look into your eyes, hear the emotion in your words. IMHO, they are much more likely to actually watch this and "connect" with it than they are to read a book that you wrote. And this segues into my next point...
....
That video idea sounds like a great one, after my dad died, years later I was sorting through some stuff, had a box of tapes in it. I played one of the tapes, expecting to hear music, and instead it was Dad's voice !!
It was really great to hear him again, as that is one sense that often is gone since photo's and written things don't convey it.