Mark McBride is the yo-yoer credited with the invention of AAA and has developed some of the first tricks in this style of play, including Velvet Rolls. In addition to authoring The Yonomicon, he is a founding member of 40 Watt Halo, a clothing/sticker design company dedicated to the skill toys community. He is a former Yomega demonstrator, a member of Duncan Crew World-Wide, and puts his extensive experience with video shoots, video editing, and producing to use by acting as cameraman/director/producer in most of Duncan's video productions.
Steve Brown is a father, husband, entrepreneur, and U.S. National YoYo Master. He invented one of the five styles of yoyo play, won a few contests, lost a few contests, and has been a pretty useful nuisance in the yoyo industry for more than 20 years. He runs YoYoNews.com, and is the #2 guy at CLYW, an amazing Canadian yoyo company. He lives in Ohio with his family and two indifferent cats.