Wes, you can link to Amazon by highlighting a word or word and clicking on the chain above (Little earth thingy with links below it.) and then putting the address in the box that pops up. That is accomplished by ctrl c-ing it at the destination. Like this:
Princess of Amathar
As long as you are promoting yourself as a writer and are very up front about the fact that you are selling your work, it's okay to link to sources. Just don't come in and say, "WOW! I just stumbled across this great book!"
BTW - it looks like a cool sort of book, haven't started reading yet, but will dl the sample. I really loved the Barsoom and Gor (Early ones) books growing up.