Extremely valuable advice can be found here, if one can step around a potential minefield of exceptions (in my humble opinion, of course!).
Valuable: The importance of your marriage coming first (or yourself if you are a single parent), establishing that you are in charge (children most definitely thrive with boundaries and expectations, in my own experience), the chapter on toys -- worth the price of the book in my opinion -- that part should be required reading for all parents! The chapter on TV is also really important - I'm not THAT strict (should be) but it did influence me to have 99% of my kids' spare time NOT in front of a TV...
Potential Minefields: His haughty, mean-spirited attitude towards pacifiers and toilet training, for one. With all due respect to Mr. Rosemond, some things really aren't that big of a deal. Especially when dealing with children with challenges/disabilities, as I have. But really, in the final analysis, it doesn't matter when a child gets off the paci and/or diapers. I've had 3 totally different experiences with those 2 "parenting challenges", and in hindsight? Truly, totally NOT a big deal. So my advice to young moms is always the same when it comes to pacis, blankets, diapers, strollers, etc.: Do What Works. Period. And read Penelope Leach's "Your Baby and Child".
I weave a philosophy that blends major aspects of Penelope Leach's views with some of John Rosemonds. Anyone who has read both might think that is a bit odd, as Ms. Leach is really nothing like Mr. Rosemond, in philosophy.
All I can say is I have found a very happy medium between the two, and it makes me a very happy and fulfilled mama.
I'd recommend this book only with the caution to not take everything in it as "gospel".