This is a ground-breaking fly tying book. It is the first to have a QR code/YouTube link for every single pattern illustrated. You can now watch Barry online tie each and every pattern then return to the corresponding chapter in the book and follow his excellent step by step instructions and tie the fly in your own time. It also has an online link with the author-expert tyer Barry Ord Clarke - who you can contact direct if you run into any difficulties! He will respond to all related questions.