This technique was 'unvented' by Stitch Diva Jennifer Hansen, inspired by the 'Magic Loop' method of circular knitting popularized by Cat Bordhi.
Part 1: The Foundation Round (see Joining the Foundation Chain lower on this page for a demo of joining the foundation round)
Part 2: Subsequent Rounds
Part 3: 3 Color Tunisian in the Round
See our 'Three Color Tunisian' tutorial for an introduction to working this technique flat.
This method of working in the round is worked with a double-ended crochet hook. Loops are worked onto the hook with one side of the hook and then worked off with the opposite end of the hook. The fabric is built up working rounds in a spiral.
Part 1: Fundamentals
Part 2: Joining the Foundation Chain
Joining the foundation chain applies to both the Double-Ended Spiral as well as the Tunisian Loop method of working in the round.