This book is a great tool for better understanding Lehmann. After several weeks of slogging through Ethics in a Christian Context, I was relieved to find this book. However, I was really disappointed to find that it did not have a topical index. I had to search all through the book for things I was trying to look up. I happen to know that an index was written, I just don't know what happened to it. But I would definitely recommend this book if the concepts of humanization and koinonia are confusing you.