The "Little Red" of OpenGL

Does anyone know where I can find an e-version of the book?
We’re a few people working with a coding project at school and we can only afford one real book =(
The problem is that 24 people looking in the same book at the same time isn’t possible

Usually called the Red Book

http://ask.ii.uib.no/ebt-bin/nph-dweb/dynaweb/SGI_Developer/OpenGL_PG/

Thanks a bunch!