This book is one of the first I have read that explores this topic of "straddlers". These are people who left (or escaped, depending on perspective) their blue collar backgrounds and moved on up into white collar, professional occupations. The book has interesting vignettes. I was interested in the topic because I felt it had resonance in my life. This is not a scholarly book, and the conclusions are not always justified by the evidence the author gives, but I think this will be an interesting read for many who grew up in similar circumstances.