A large collection of e-books:
h**p://truncode.sourceforge.net/

A little e-books:
h**p://physics.dit.ie/resources/physicstech4/comp/
h**p://www.personal.psu.edu/users/r/r/rrr148/Library.htm

Assembly:
h**p://asm.shadrinsk.net/docum.htm (russian language )