The book was very well written and very strong. Hughes explains why the Church of God believes what it does and of course what it is we believe. The book is full of scripture aimed at demonstrating why such beliefs are needed and scriptural. The book itself is an old book, and Hughes' examples in some cases were outdated, but the points remained the same. I have noticed after reading the book, that there are several "distinctives" that are no longer distinctive today in the church. Some we are probably better for having gained more clarity. Others, may hold the key into the decline of Christianity as a whole in America.
Whether for research or pure enjoyment, I would recommend Hughes' book.