I picked up this book because of its link to calling; an ongoing interest of mine. I found it "A Tale of Two Books". (Must have that title on my mind.)
The first few chapters were excellent. Mr. Smith lays out his views on calling and vocation, making a compelling case of work as our calling and the sacredness of all work. I found these to be well thought out and presented. I also found very helpful a following chapter on on the stages of life and how our calling moves with us through life.
The remainder of the book, however, disappointed. A chapter on "four vocations" where Mr. Smith illustrates his thoughts in the areas of business, the arts, education and religious leadership seems poorly thought out and rather surface. The chapter on courage and character (immediately after the four vocations) was decent but without a clear connection to the flow of the book. A chapter near the end on working in organizations was a very surface treatment of what has been written about to a much deeper (and better) level in other places. A 147-page book that ends with "Thinking Vocationally" would, in my view, have been far stronger.
If you are interested in, or passionate about vocation and work, pick up the book. But if you stop reading about mid-way through it, I'll understand.