-You're not going to find any books that feature either in any meaningful way (or, Celadrin in any way whatsoever). There was an Eladrin that was an important part of the plot 2/3 of the way through the Last Mythal trilogy, but that's pretty much it.
(A Tri-Partite Arcanist Who Has Forgotten More Than Most Will Ever Know)
Noble eladrin are powerful archfey of comparative strength to demon princes or archdevils, and who are most commonly found in the Feywild or celestial planes, particularly Arvandor and Gates of the Moon.
As I remember noble eladrin do exist in the fourth edition. They are mentioned in the Player's handbook on page 39.
I don't know do celadrin exist in the fourth edition or not. Maybe somebody can anwser this question?
the answer you are seeking, is NO there are no books on them either 3.x or 4e.
if you mean the Leshey... nother ball game, but still no books that deal with them specifically.
why is being a wizard like being a drow? both are likely to find a dagger in the back from a rival or one looking to further his own goals, fame and power