This book pretty much does as the title suggests: it is a very clearly laid out practical guide for how to deal with lifes most puzzling issues from a non-religious point of view. Most of the common questions that have "easy" answers in religion (although how meaningful those answers are depends very much on faith) have been addressed in this book very well without resorting to anything more than reason and evidence.
The format of the book is set out in individual chapters which each address a different topic. After a few pages of introduction to each chapter, the author then sets out a good number of questions that are then answered very well. The format lends itself well to "pick up and read the relevant bit only" as well as easy cover-to-cover reading.
There are a number of activities at the end of each chapter, which are designed to get the family thinking and playing with ideas about the big questions. These activities cover age groups from a few years old right up to teens. There are also very good references to further reading and links to websites.
As good a starting point as you'd need, in my opinion.