Reiki?

[valkyriur.livejournal.com]

I do my own version of healing for people. I ask before doing anything normally. What I end up doing is transmitting colors and music to them (they may not view it as that, but that is what I do), and it has been quite effective in most of my encounters.

I would like to expand on my healing though and I've heard that Reiki is effective. Before I go searching for a place that does classes though, I'd like to know a little more about it (really all I know about it is that it involves healing). Could anybody suggest a good informational book about Reiki? I'd really appreciate it.