If your newborn baby is crying uncontrollably, the challenge is to soothe her. The book introduces The 5 S's (in this order): Swaddle, Side hold, Shush, Swing, Suck. Then explains how and why to do each one. Some babies will be soothed just after a Swaddle, some babies need all 5. Each S must be done perfectly to work.

The methods worked pretty well for me, but it took me some time to get them right. It is worth a try if you're having too many sleepless nights. However, beyond a certain point (when the baby is 4+ months) it doesn't work as well and you need to find other methods. This is really intended for newborns.