Segomaros Widugeni, author of Ancient Fire: An Introduction to Gaulish Polytheism:  I cannot recommend this book highly enough. Indeed, I would call it a worthy successor to the work of the late, great

Katherine Briggs: The most highly regarded expert on fairies in the last half of the 20th century. 

Mary Jones, The Celtic Literature Collective: This is a truly impressive work. Daimler moves seamlessly between Celtic and Germanic experiences of Fairy and provides the reader with a well-sourced guide for anyone curious about all the different aspects of Fairylore. From the earliest Irish texts to modern encounters, Daimler takes in the full scope of the subject and presents the reader with one of the best-researched volumes on the subject. Everyone curious about the Other Crowd needs this on their shelf.