Let's say that you are a doctor and want to make a quick buck by writing a book. Let's say that you want to pick a problem that all parents are desperate to solve. What would you choose?

Lice? Icky, but not universal.

Potty Training? Good, but only if you call it "toilet learning" and have some new fangled approach.

No, what you need to do is write a book about sleep.

All new parents worry about if their baby will ever sleep like a "normal" human being. Yes, there are the rare newborns who sack out for 12 hours every night from the moment they are two days old. These newborns are as hard to find as unicorns, however.

Regardless, sleep and the lack thereof is the one thing that makes all parents nuts enough to buy any book that offers the slightest hope. But if it's a problem that effects 52 percent of breastfed babies, as Dr. Jodi A. Mindell suggests, maybe a book is not going to be able to rewire the brains of a majority of infants.