This book truly is a 'letter' (albeit a long one) to the author's grandchildren, ages 12 to 22. But it is not a "children's book," either in subject matter or in style. It is personal in that the author reflects on his own personal experiences while growing up and later in his life and he is clearly talking to people he knows and loves. It is also personal in the sense that it deals with issues of great importance to people who are going through their formative years. But it is not a book of advice or admonition. Rather, it raises questions for the kids to ponder. It pushes them to think outside the boxes of their (and their peer's) common concerns and it does so in the context of some of the most profound issues we face as humans.