My guess is that if you are looking up this book it is because you are familliar with Scott Peck's work and particulary with The Road Less Travelled. The Road Less Travelled had a profound impact on me in my early twenties - as I know it did millions of other people. Further Along the Road is just as good, if not better.
I read it recently in my thirties and it felt like an extraordinarily wise and more mature book. I believe the man who wrote it, has grown in wisdom and maturity and he shares that here in a style which is, as always, clear, thought-provoking and above all affecting. I felt like I was in the presence of a real truth-seeker and a man who had come a good way down the Less Travelled Road himself, and was not afraid to admit his failings and pitfalls.
I might add that after the Road less Travelled I bought a number of other Scott Peck books ( A Different Drum, A World WAiting to Be Born, People of the Lie) and was usually disappointed. Further Along on the other hand is a seriously good book. Highly recommended for all seekers of wisdom.