Each conference and institute gives you a comprehensive syllabus. The instructors spend a lot of time compiling all of this material for your benefit. It is filled with sources that they feel will help you on the given topic presented. In short, it is a gold mine of information. The instructors are (hopefully) experts on their subject or field. They know what sources of information are out there, and which ones are good to go to for more in depth information. So instead of you trying to figure out what text is worth your time and/or money, they have done it for you.
I am constantly going back to my syllabus materials for ideas. Sometimes it may be for a NGSQ article to read, or a book on a topic I need to learn more about. Remember, the instructors started out as newbies too and along the way they became experts. Don't you wonder what they read to become the experts they are? Well, check out that syllabus sitting on your shelf and you will find out.