Not got her book yet (not enough pennies, too many bills haha)... But I know she has a code for a discount at Deramores so I guess she must use them for a lot of yarn. I think she uses Audriafill for the fox scarf. Hope that helps
have seen one of her pattern in mollie makes, calls for Cascade Magnum. can't find in deramores but it's in the knitting shop for £20 a ball and pattern calls for 3 balls. out of my price range so i'd have to hunt around for an alternative anyway.