Does anyone have these and want to sell them or know where I can t them without signing up for the class? Last time I visited TLI (Taipei? Taiwan? Language Institute) they said I had to sign up for the class to buy the books. I did, but they started me with book 2 and it's too advanced. Now I live too far to take classes from them, but I like their system and recommend it to anyone who wants to learn Chinese.