I'll start with the positives. Yes, it is interesting to consider how television has influenced children. Psychologists and other child researches have done extensive work on this and found that television's effects are mixed. Sesame Street, for example, is generally positive for children and their learning. Violent shows, are not. Media and culture also influence perceptions of children. But none of this is revolutionary, and it doesn't make up for the glaring deficiencies in this author's review of child history.
First, the author conveniently forgets that the history of childhood is a lot older than ancient Greece. Hunter-gatherers and agriculturalists provide a very different model. Second, the author brutally cherry-picks his data. There are dozens of examples of how much parents care for their children in each of Rome, Greece, and Medieval Europe, not to mention around the world. There are reams of evidence that children were treated as children, and recognized as such, throughout history. Until they were sexually mature, children were almost universally recognized as children, and treated differently than adults. Third, the author ignores plenty of modern evidence (e.g., abortion is a modern form of infanticide, as more arguably, so it birth control). I'm not casting judgments on those examples, just calling them for what they are- the same behavior with a different trapping. Parents in the past had to kill unwanted babies. As time went on and civilizations grew large enough to handle the surplus infants, adoption was created for unwanted babies. Now, birth control and abortion largely solve the issue of unwanted babies. Finally, people have been complaining about upcoming generations since ancient Greece, at least. The tired, but very familiar, refrain of "Today's kids are lazy, have less respect, less morals, etc." has been claimed by virtually every generation since Socrates. It's a tired hash that says nothing about what's actually going on.
So if you want to learn about today's children, I'd highly recommend reading about actual modern research on the effects of television on children. There's good books based on actual data. If you want to read about the history of childhood, and concepts of childhood, the same thing. Rawson's book of children in ancient Rome, Cunningham's book on children in Europe 1500-2000, Hewlett and Lamb's book on hunter-gatherer children, and possibly Stearns book on the history of childhood, are all MUCH better places to read about how children were truly viewed historically. And you'll find, not surprisingly, that while there were some differences, generally speaking adults treated children much the same way throughout history, and that the concept of childhood has changed very little.
Certainly, it is not disappearing. So I'd recommend spending your money elsewhere than this book.