This is a very unusual design. It is an anamorphic representation of one of our much older designs called 'Long and Winding Road'. When a cylinder is placed on this afghan the original rectangular spiral can be seen in the cylinder.
Without the cylinder, this blanket is interesting in its own right. It becomes a labyrinth.
The Oxford English Dictionary defines anamorphosis as 'A distorted projection or drawing of anything, which appears normal when viewed from a particular point or by means of a suitable mirror.'
The afghan in the photo was made in DK yarn and measures approximately 135 cm (53") in diameter. It can be made in any yarn and the pattern contains information for changing the size.
This is a very detailed pattern. It is not difficult but the instructions must be followed systematically and carefully. Only one yarn is used at a time. Much of it is knitted in narrow pieces with no more than 40 stitches on the needle. Other parts are knitted in one piece with up to 700 stitches on the needles. You will probably need two circular needles to hold the number of stitches. The gaps between the 'rays' have to be stitched when the knitting is finished