Does anyone have any recommendations on a good, but scientific, intro to meditation practices? All the ones I read seem so interspersed with nonsense I find incredibly distracting. And not just "secular", either.

I'm referring to talk about "Life force" or "true nature" etc. Those are matters of biology and physics, so writing about them when your only source of knowledge is sitting by yourself thinking private thoughts, stretches credibility a bit.

I'm sure I would gain a lot by being able to shut my mind up at times. And indeed, I find induced mental states to be great. But while I can lie to myself about many things, I can't seem to do it with mysticism around mediation. I'd like to eliminate that hurdle.