I don't know that I would call Child of Dreams the best Batman story in years.
Greg Rucka and Ed Brubaker were doing some truly amazing work on Detective and Batman before Jeph Loeb and Jim Lee came along and the emphasis switched from substance to style. Also, Dwayne McDuffie produced two of the best Batman stories you'll ever read for Legends of the Dark Knight.
That being said, Child of Dreams is very, very good. It is well worth the $24.95 price tag.
A very simple, but engaging, introduction to Batman and his world.