I've heard mixed reviews (mostly bad) about the SW
Aquariums for Dummies book. I haven't read it, so I can't comment specifically about it. But I know Paletta's and Fenner's books are good. Just be aware that you're going to encounter numerous opinions in this hobby on how something should be done. There are many different ways to do things, and some ways work better than others. Understanding the basics about the hobby will let you make informed decisions on what advice to follow, and what advice is just plain hooey!
Regarding the additional live rock... I'd add it now, or within a few days of throwing in the shrimp. If you wait too long, or after the cycle is over, any possible stuff dieing off from the rock will fuel another cycle, prolonging the whole thing.
As cmor mentioned, you haven't even started the cycle. All your water parameters are perfect because, well... there's nothing in the water to make it bad at this point.
You said you got the water from the "marine aquarium". What exactly does that mean? Do you have an aquarium near you that sells salt water? Just curious because for a reef tank, your water source is one of the more important aspects of the hobby. We strive for perfect water parameters, but if the water you're starting off with and doing water changes with is less than perfect, well... you're never going to get better than that. That's why many folks will invest in a RO
filter system to get 100% pure water. Just a seed to plant for future ideas. I have an aquarium within 30 minutes of me that sells salt water. But even filtered and sterilized, I'd still never even think about putting that stuff in my tank. Especially since it's being drawn from a point a few miles from some of the worst toxic dump sites in our state.
Also... just noticed that your pH is a little on the low side. Eventually, it ideally should be somewhere between 8.0 and 8.4... but stability day to day is more the key. But don't worry about it during the cycle. pH will swing around quite a bit during a cycle and will take a few weeks to stabilize after it's all over. I wouldn't even waste the test kit drops on it until you're done with the cycle.