Thanks. I agree. This is a place holder right now. Since I wrote the post many stackers gave me suggestions that I haven't incorporated yet. I'm also thinking about letting stackers decide what should be the best instructional content for a given topic. For instance, @elvismercury and I differed on what was the best introductory book. I don't want to be the one to solely make these decisions. I have to figure out how to do it. I'll post about my tentative plans soon.