This pattern comes from the book Mon cours de crochet, that is published by Marabout, a french editor.
It is inspired by a japanese book.

Here is a link to see the book:
http://www.amazon.fr/Mon-cours-crochet-Marion-Madel/dp/25...

About the yarn:
The original pattern is made with 4 skeins (50g=75m) of a yarn 60% alpaga, 40% wool, but they don’t tell the name, neither the brand…

N.B. I tried the pattern with Katia’s Suraya, and it’s working very well.