This is a really beautiful little book about morality and the Catholic Faith. It would make a great supplement for high school age or excellent reading for an adult. It's not too difficult to understand, but also interesting and really makes you think. The author has this to say about the purpose of this book:

A traveler through life gets vivid – sometimes extremely vivid impressions of things near at hand: confused impressions of things seen at a distance or only heard of: but of the whole plan of life, no idea at all. In his mind will be a jumble of facts, tossed about in any order – God, sin, church-going, disease, sacraments, suffering, the treason of friends, hostilities, death and the fear of death, money and the loss of it, God-made-man – and so on without end. But which of these things are big things and which of them are little, he will not know with certainty: the things that have come nearest to himself will seem big things: the remoter things will seem small. And of the relations of these things one to another – how one thing agrees with, or conflicts with, another – of all this, merely by dint of living, he will have only the most confused and uncertain impression. In fact it may easily happen that a man who merely lives, and neither reflects nor is taught, does not even suspect relationships, but thinks of all things as accidents with no reason in themselves save that they happened, and no connection with each other save that one cam earlier and one came later. Because of this confusion, I propose to try to make what may roughly be called a map of life.

This is a great book to use for a teen group discussion. When I was being homeschooled for high school, a friend of the family guided us in discussions of one chapter every month. We found it very engaging and helpful.