Pics are looking good, I assume by almost done with book one you meant you bought and/or are going through the kelby series?
Not sure what mystery coral is, but probably finger leather. Also watch for babies around the tank from that Kenya tree coral (pinkish leather). I had one and it was somewhere between softball and basketball sized when I finally got rid if it. And it dropped new babies all the time, and they got all over the tank. Not really a problem since they don't hurt anything, they just get everywhere. Cheap and easy frags to sell though!
Otherwise looking good, keep up the good work!