Books
Modeling and simulation in Scilab/Scicos
By Stephen La Vern Campbell, Jean-Philippe Chancelier, Ramine Nikoukhah
http://books.google.com/books?id=F1zYYOrQzgQCEngineering and scientific computing with Scilab
By Claude Gomez
http://books.google.com/books?id=mpkznLUemMoCProgramming in Scilab 4.1
by Vinu V Das: http://www.dkagencies.com/doc/from/1063/to/1123/bkId/DK9163217162761057464299794971/details.html