European Myth and Legend: an A-Z of People and Places by Mike Dixon-Kennedy

What we usually think of European Myth and Legend covers more than just the Viking myths, but incorporates that of Germany (Teutonic), Russia, and the Angles, Jutes and Saxons of England. Celtic myth isn't really a part of it, since Celtic culture spread from India to Ireland, and so isn't strictly "European" for the most part. But the Celtic peoples and culture are given a mention and covered.

This is nothing less than a fairly exhaustive list of the people, places and things in Northern European Myth and Legend: the Rings of the Nebelungs, the Nebelungenlied itself, Vili, Ve, Audhumla the cow and the giant Buri, Loki, Wotan/Odhinn, and Thorr, Frig, Freya, and Frey- all these and more can be found between the pages of the book. You might think this is a book of legends and lore, but mainly it's lore, the legends aren't told in any sort of detail. If you already know them, then you can find pieces of them being discussed, but the legends themselves are missing.

But as a guide to the sorts of things spoken about in those tales, like Bisingamen or Frey's boar "Golden Bristles", those you will find discussed at length, from the earliest tales to the more modern (which may still be very old despite them being spoken of as modern).

Since none of the actual legends are told, this book tends to be rather dry and boring, tales spoken of in passing than recounted. But if you come across a reference you don't understand, this is the place to look it up, but for actual norse, germanic and Russian legends (like the story of the Firebird), you will have to look elsewhere. Not much fun to read, but recommended for as far as it goes.