Seventh Day Adventists: What are your thoughts on this?

Honestly, if you are reading anything other than the Bible you are not going to get much attention from a Seventh-day Adventist. I am a Seventh day adventist and I believe that all the books that were inspired by God are in the Bible. I honestly don't understand what that is saying up there, and where your argument is coming from either, but I do know if the Epistle of Barnabas isn't in the Bible then it isn't inspired by God but by man.