DIY hi-fi used to be an important aspect of audio magazine content 30 and more years ago, but these days it has migrated almost completely to the Internet, with just Ed Dell's AudioXpress magazine still waving the roll-your-own flag in print. Sharing a stand at RMAF were two of the Internet's most notable DIY engineers, Jan Didden from Holland (left) and Bob Cordell from New Jersey (right), and both were venturing into the print medium. Bob had advance copies of his new tome Designing Audio Power Amplifiers for sale, which I will be reviewing in Stereophile early in the New Year. Jan had the first volume of his new bookzine Linear Audio, which has articles on audio design from Bob, as well as Doug Self, Joachim Gerhardt, Nelson Pass, Siegfried Linkwitz, and many others. But if you have any interest at all in the nuts and bolts of audio design, don't wait for my reviews of these books; check them out for yourself. There's audiophile gold within their pages!