The Knook is a crochet hook with an eye at the non-hook end.
The Knook can be used both as a crochet hook and a knitting needle. You can knit with one single Knook.
It can be used for both flat and circular knitting.
With a knook (hook), you create actual knitted stitches. It is the new knitting with a hook, hence the name "knook" or "knooking."
Kooking is said to have originated in Japan.