former pro Player and hitting Coach Homer Bush has brought out a book called "hitting low in the Zone" were he proposes that hitters should Zone low in the Zone because that is were most pitches are and try to lift them in the air.
The book brings up some good Points while citing a lot of stats like using a slight Uppercut to lift those pitches (although Overall the mechanics part is not very detailed).
http://hittinglowinthezone.com/
however the book also makes some very outrageous Claims, for example he says that with his Approach (the mike trout Approach basically) good pitching doesn't have an edge anymore and that too much walks are bad and Clog the bases (he proposes to put the low pitch in Play hard in the air early in the Count and that this would make Baseball more attractive because that means more power and less walks which are boring in his opinion).
some good Points in that book but also some questionable stuff, I would also have liked him doing a Little more Research on modern batting mechanics, he said he did a lot of Research for the book but Overall it basically was old School teaching couple with a couple "new" cues like angling the bat down and Swinging up.