A self-guided workshop program by Paul O'Connor that leads weavers step by step through double weave on a four-shaft loom, adapted from his multi-day guild and conference workshops. It explains how the drawdown and tieup of double weave arise from the weave structure (top and bottom layers, raising the top-layer shafts to weave the bottom layer). It then varies treadling order, tieup (shorthand such as 13/24 and 24/13, and the six tieups of each group), threading, and warp and weft yarn sizes. It closes with practical loom tips and exercises covering two layers, double width, tubular weave, and color effects.