Hey Daniel,
Just to comment on the grip you saw in the book, having your right hand pretty much (but not quite completely) flush against the tsuba is occasionally found in Iai single hand techniques for a more solid, supported grip, to handle the impact of cutting a target. For a two handed grip, definately a no-no. The right hand should grip the tsuka at an angle, allowing a bit of space to manouevre the sword, giving the ability to control the direction of the blade. I'd be wary of the rest of the book myself...