I don't play it myself but I think it's very interesting for black I'm thinking about tryin it out myself.
Did you try searching online? When you google it there are tons of material and the one of the best as usual are on chessgames.com:
http://www.chessgames.com/perl/chesscollection?cid=1003670
Hi chess.com community,
I was wondering whether any of you know of a good book/training dvd on the Tarrasch Defence (against 1.d4)
Also, I would like to get a general feel on the opinions of this opening. Is it sound? If so, why is it not being used more often at high levels in recent times?
Thanks so much guys/girls. =)