This is my newest crochet pattern, first of 2015, the Aztec Scarf. I am so in love with fair isle, I should even say I am addicted to it. Most of the patterns I have been working behind the scenes are fair isle. I had a real hard time sending this scarf to the photographer, I really wanted to keep it!
Fair Isle (usually a knitting term) is a tapestry crochet technique, where you have work with two strands of yarn at the same time to create color work. You have what we call "working yarn" and you carry another strand and you switch back and forth to create shapes. It's fun and it's rewarding, it takes crochet to another level, in my humble opinion.
Don't be afraid to try, it is really not hard at all.