I am interested, but sincerely ignorant of Tolkien (beyond the fact he is the author of The Lord of the Rings). I just did a quick wikipedia read however - interesting stuff! Is the script of Tengwar actually printed in the books and legible?
I won't steal Eikadistes 's fire, but chime in on my own experience.
The Appendices of The Lord of Rings have a whole section on the languages and wriiting systems. They can be see in use on most editions' title pages, on The Doors of Durin at the entrance to Moria, in the song book "The Road Goes Ever On" with Tolkien and Swann, and in Tolkien calligraphy online (and there's a LOT of fan art with the letters).
The thing that has always endeared Tolkien to me is that **the languages came first**! He was a conlanger from an early age, created the "Elvish" languages and wanted a world in which they were spoken... hence Middle-earth came into being!
If you're curious at all, a wonderful site is Ardalambion from Helge Fauskanger.
I realize we're way afield of Epicurus's Garden here, so I'll put my Tolkien fandom (which began back in the late 70s/early 80s) back into my pocketses for now.