A question about big hand limpers...

[sudic]

Ok!
Now I'm really confused!
I basically still a beginner.
I use to raise AQo but got tired of losing to made Kings on the flop or turn.
I'm sure this is probably more of an overcard play issue.
Nevertheless, on my own I started to limp AQo, so I could see the flop as cheap as possible.
I know that this allows the blinds to stay in for free, but like I said I got tired of betting only to lose on the turn.
Recently, I ran across a book where the author says limp with not only AQo but also AQs!
Burton-Get the Edge at Low-Limit Texas Hold'em.
See p51 for his pre-flop chart.
He likes to see the flop as cheaply as possible and if its favorable then bet.

What's a newbie to do?
Or who to believe?