“Value added textile yarns” means a thread increases its value from the conventional ones with respect to price and aesthetic and functional properties or all at a time. These may be the changes of either bulk, colour, using different raw materials, any changes of technical parameters periodically or randomly etc. along the length of the yarns. Value added also refers to the worth added to a product during production process, means the difference between the selling price and the cost of production is more from the normal product. The more the difference, more will be the value added. The global market of “Value added Textile Yarns” and its products is leaping forward as the conscious of the mankind is gradually increasing. The textile products are lighter, stronger, less effective by the environment are getting popularity in each field of engineering. The book deals from the basic value added yarns, like doubled or folded yarns, to the modern concept of novelty yarns in different fields, like fancy yarns, conductive yarns, medical yarns etc. The book is also discussed the production of bottle flake yarns. Manufacturing technology including modern and conventional is also described in short here, but the most important and necessary material are incorporated. Mathematical Calculation, important technical parameters, etc. are also mentioned. We do hope that the book will satisfy the students, researchers and also those who are in the industries.