
1) British fantasy novel 2) Celtic boy name 3) William Collins, Sons book
Found on
https://www.crosswordclues.com/clue/elidor

Elidor is a children`s fantasy novel by the British author Alan Garner, published by Collins in 1965. Set primarily in modern Manchester, it features four English children who enter a fantasy world, fulfill a quest there, and return to find that the enemy has followed them into our world. Translations have been published in nine languages and it ....
Found on
http://en.wikipedia.org/wiki/Elidor
No exact match found.