You can find Barclays’ VXX prospectus here. The prospectus covers both the short term VXX, and the medium term VXZ.
This post discusses going long on VXX.
This post discusses some choices if you think VXX is going to go down.
For an estimated date for VXX’s next reverse split see this post.
For an overview of how VXX works, see “How Does VXX Work?”
For a detailed analysis of how VXX’s roll works see “How Does VXX’ Daily Roll Work?”
For a full list of volatility ETN/ETFs see Volatility Tickers.