While Ms. Forest gives plenty of background regarding the Celtic spiritual traditions, particularly those with a shamanic bent, this is largely a practical book. It takes the reader through the process of creating shamanic tools, finding spirit allies in nature, connecting with the ancestors, traveling among the worlds and seeking knowledge of the future through divination. I do recommend following it up with further training if you intend to continue with shamanic practice but this book provides a firm foundation for basic shamanic practice in a Celtic style and is an excellent starting point for those who are interested in this path.
Find more information about this book on the publisher's website. It is available on Amazon.com, Amazon.co.uk, and other online and brick-and-mortar booksellers.