The Complete Serger Handbook
Though it is currently out of stock, Amazon will honor the price you buy it at, and since it is listed at $2.15 and eligible for free shipping, anyone with a serger should get this highly-reviewed book.
Sewing with Sergers: The Complete Handbook for Overlock Sewing
This book introduces beginners to the basics of using a serger, including stitch types, fabric tension, decorative techniques and other concepts. It also includes projects such as napkins, a swimsuit and even a sweater.
Serger Sewing Basics
This book breaks down the anatomy of a serger, teaches several stitch types, decorative techniques and includes 13 different patterns to help you get started with your serger.
Each of these books has a four-star rating or higher, and comes with free shipping options from Amazon. If you are ready to learn how to use your serger instead of letting it collect dust, grab one of these books to help you get started.