Brett Terpstra develops a Markdown previewer for Mac called Marked 2, and co-authored ‘60 Mountain Lion Tips’ with David Sparks for the iBook Store. He’s currently working on a couple of new books, including one on tagging (that may or may not ever reach fruition). Brett occasionally write for MacStories, previously contributed to TUAW, Macworld, and other tech/Mac blogs.
You can also listen in as Brett chats with a broad range of guests on my podcast, Systematic, as well as my more eccentric (and often entertaining) conversations with Christina Warren on Overtired. Both podcasts are now on the ESN network.