Kyaho!! Kanra-chan deeesu~ ~Kanrachanplz (https://www.deviantart.com/kanrachanplz)
Today we bring you: Durarara!! Light Novel (original japanese text + chinese and english translations) aaaaand english translations of the manga, plus some spoilers about me! Kanra-chan! http://www.hongfire.com/forum/showthread.php?t=129107&page=1
DRRR!! Light Novel (chinese translations)
Not too sure about this... but I think it should be COMPLETE
Volumes available: 1 - 8 + extras --> http://book.sky-fire.com/Novel/7083/MainIndex/
DRRR!! Light Novel (english translations)
COMPLETE look for the light novels menu on the left and click Durarara!!
Volumes available: 1 --> http://www.baka-tsuki.