Apprehensions about Public Speaking

To be honest, I am very comfortable about public speaking. Doing a presentation for a class is nothing new to me, because I took many courses throughout high school and college that have had heavy public speaking requirements. However what I do have apprehensions about is the material that I will be presenting. At my professor's suggestion I took on the harder of the two topics to write my multi-draft presentation on. The information detailed in "The Tipping Point" by Malcolm Gladwell is sometimes very confusing and I hope that I can accurately portray my topic using his ideas and definitions correctly. Overall, I know that I can do well if I have all of the necessary material correct and in order.