‘Celtic mythology’ is such a wide topic that it’s difficult to pin down. The stories that fall into this category hail from Wales, Ireland, Scotland, the Isle of Man, and many other places in and around the British Isles and Northern Europe. Because of the distinct ancient cultures and histories of these places, any look at Celtic mythology has to acknowledge that only a small portion can be covered in a single book. Some historians have looked at the histories and cultural contexts of famous stories, and the real-world events behind legendary characters, while fiction authors have brought a modern angle to old, much-loved stories. Here are some of the best books about, or featuring, Celtic mythology. Many of these books draw specifically on Irish mythology, and if you’re interested in exploring Irish writing more deeply, try our list of 15 Irish Authors You Need to Read. For books that look at a different, but equally rich and fascinating area of mythology, try 15 of the Best Indian Mythology Books for Children.