The manual for the geometry package should be in the docs folder of your LaTeX distribution.
Failing that, one can always fetch it from CTAN:
http://mirror.ctan.org/macros/latex/...y/geometry.pdf
You might find the ``brotherton'' option in memoir of interest (it was an adaptation of a page layout I worked up when making a .pdf of Mike Brotherton's novel _Stardragon_):
http://www.ctan.org/tex-archive/macr...ontrib/memoir/
If you want a nice front-end, I'd suggest LyX:
www.lyx.org
William