This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I believe that the common-aux.#.#.#.jar is a JAR file which is provided by SpringSource as a separate JAR file to be used within classroom examples. You would need to pull it from the files provided as part of the class and then have your IDE reference the JAR file.