It's from Simple Sewing by Lotta Jansdotter; a wonderful book I really recommend. I only want to make every project in it. I modified the pattern ever so slightly; I made the interior pocket much bigger and made the straps long enough to put over my shoulder. I also added a light weight interfacing to give it more structure. I love the way it came out and may be making them for Christmas presents.
I've got my yarn, Knitpick's Telemark in Tangelo and Aubergine
I've knit about a half a dozen swatches (I'm really glad I got that extra ball of each color) and the last one is spot on for stitch gauge and a bit off for row gauge after washing and drying. So now to cast on and knit all that ribbing.