Having access to a wireframing application will be extremely helpful. This book will not focus on any particular application. Instead, it will cover UX design concepts that can be applied to whichever application you choose to use. Desktop applications such as Axure, Omnigraffle, and Visio are commonly used by design professionals. There are also many web-based wireframing applications that can be used. Some of these include Balsamiq, Moqups, UXPin, HotGloo, and QuirckTools. Many of these online options are free to use or free to try. I would recommend trying several to discover one that best meets your needs.