I've read/heard the "Dictionary", the "Galactic Traveler", "Power Klingon", the "Warrior's Guide", "Conversational Klingon" and used the "Klingon Language Lab".
I remember several sentences and grammar, I've also memorized some songs from episodes. It is an easy language when grammar is concerned, but it's hard to remember the words.
“English! I thought I dreamed hearing it!”
Khan, Space Seed (TOS)
Brought to you in living color by NCC.
-= first fan member =-