Joan Leonard's Twice Blessed offers everything you need to know about having a second child--preparing yourself, your marriage, and your firstborn for a new family of four.

Just when you thought you were finally adjusting to being a parent--your stretch marks have faded and you've packed away your nursing bras and maternity clothes--you decide to have a second child. And although by now you may feel like a parenting expert, the second time around brings its own set of questions, quandaries, and chaos, from tighter finances to new routines.

Drawing on the...