An introduction to creating authentic Celtic knotwork designs, providing a comprehensive plotting course and design library. There are over 400 designs, following a step-by-step process. Typical designs are worked through, with each step clearly explained. Basic designs include heart and loop shapes and move on to more complicated designs which combine different base knots. Add animal heads and tails to close knotwork borders and extend feet, eyes, ears, tails and tongues for more intricate designs. Celtic designs have a range of applications, and can be adapted for use in arts and crafts such as woodcarving, embroidery, knitting, parchment craft, patchwork, quilling, and lace making.