Aaron Shaf. was interviewed by the Mormon Expression podcast. You can hear in his own words what he hopes to accomplish through his evangelism to Mormons and why he does what he does. I don’t agree with everything Aaron does or says, but I think it is helpful to hear his voice.
For lack of a better place to discuss it, Aaron and Mormon Research Ministries have also posted an online version of the Journal of Discourses. All text includes a link to a BYU hosted pdf of each page.