I think he is perfectly reasonable in not giving out his slides. A lot of people put up slides on slideshare or somewhere else, as if those alone gives you a co

I think he is perfectly reasonable in not giving out his slides. A lot of people put up slides on slideshare or somewhere else, as if those alone gives you a comprehensible understanding of what subject they are presenting - it does not! A good presentation has few slides with a few key points, some images and the rest should come from the presenter. In contrast, an article explaining a subject is primarily made up of text, code samples and a few images. If you try to aim for the middle ground, you are going to get something that is sub-par for both.