I just thought that a note would be a good idea, since the sequel is up and running now. It's called Of Masks and Mirrors by yours truly! Here's the summary:
Sequel to OPAL. TimeTravel. "Who are you?" he whispered. There was a mocking laugh. The figure turned around with a flourish. "I'm quite surprised you haven't figured it out, but then again you are a realist." He leaned forward. "I'm you," he whispered.
It's a little spoiler, but who doesn't like a little spoiler every now and then?
Check it out if you're interested. If not, it twas nice having you here for a while!