Other about light novel, you can read from here: (credit to subsmith.wordpress.com)
Angel Beats! -Track ZERO- Chapter 1 – A Rocket for Two
Angel Beats -Track Zero- Extra Chapter 1 English translation.
4-koma chapter three excerpt and chapter eight.
All chapters plus AB goodies courtesy of anon
GirlsDeMon in Animelo 2010 (credit to uploader)
Light Novel From wikia AB!
Angel Beats Track Zero Chapter 01
Credit to them ok ^o^