I would also love to see some books on the subject! My daughter is seven, and has known about this for two years. She grew up around the LGBT* community, so she already sees being trans* as normal, but I gave her two years of an ongoing open dialogue before coming out publicly and beginning to transition in any way. I probably didn't need to wait quite so long, but I wanted to be absolutely sure that not only I was ready, but that she was too. I think, however you go through this, like anything else with kids, making sure to keep an ongoing dialogue with them is best, so that they know that you're open with them and that they can ask any questions or discuss anything openly and honestly. I think if there is that level of communication with kids, it can be much smoother, and easier on them. But again, that's probably true with any big changes with kids.