Note though that it is almost impossible to separate meditation as it relates to your mind, and meditation as it relates to your bodily actions. When you start to understand the way your mind works, and how everything fits together, you would have to be pretty ignorant to not alter your actions accordingly. Indeed, using your brain 'more effectively' can only happen by applying what you learn.
(IE, there is no state that you 'attain' and from then on you are 'more effective'. Meditation is a 'practice' and so you must practice it, you don't attain anything at all)
edit: correcting misspelled book title. Should be "Buddhism Without Beliefs" not "Buddhist Without Beliefs".
Are you aware of great alternative book that might be available in digital format?
http://www.sfzc.org/zc/display.asp?catid=1,5,168&pageid=... http://szc.org.au/reading.html
Given the context of this discussion, I would recommend reading Charlotte Joko Beck's books. Specifically Nothing Special, which is available digitally on Amazon :)
Looking forward to some reading!