Me too, and I often go back and read over the ones I've read in the past. It's like watching a movie the second time - you pick up things you missed before. I have one of the first versions of "Effective Perl Programming". The discussion about "my" and "local" is in the chapter on subroutines. Along with typeglobs, it seems one of the more subtle less understood notions in Perl. (My understanding is only partial, for sure.)
chas