For those interested in engine management options not offered by the POH, or even an opinion about the inaccuracies in some POH's, the articles by John Deakin in AVweb might be interesting reading. They can be found at:
http://www.avweb.com/news/columns/182146-1.html
In particular: #75 and #76 “Those Dreadful POH’s” and #63 through #66 “Where should I run my engine” (discussing in detail engine management during Takeoff, Climb, Cruise, and Descent.)
You can decide what or who is the better to follow, the POH or John, but all his articles are highly informative.
Regards,
W.B.