I have been asked to write a brief essay about my favorite parts of the book. That is hard, because I like it all. Writing each section had its challenges and its rewards. Let me instead describe all the main parts.
The first part talks about oneness - "ekta" - in all the configurations we today understand it. From an evolutionary point of view, we all share DNA with every living thing. Then there is the matter of consciousness. Sir Jagdis Chandra Bhose went to far as to prove scientifically that there is feeling and consciousness in plants, maybe metals too.
The second is about "hukam" - the amazing timestream we live in, how things happen for apparently no reason. And also the taking of hukam. Not only Sikhs do that.
The third part is about "sarbat da bhalla" - a pretty new concept for our humanity. It a number of stories of Sikh history from the 16th to the 20th century that illustrate that point, plus 15 great stories of nonSikhs doing the same within the last few years. You see, the genie is out of the bottle. Lots of people are doing seva these days and they are not all Sikhs.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=33012
Section four is "akal moorat". Over 65 pages it outlines the essential virtues of the body as holy and complete in itself - then goes into all the ways humanity has managed to add and subtract from the body, mostly for cultural reasons. Foot-binding, cosmetic surgery, tattooing, lobotomy and so much more is covered here.
Section five covers the basic lifestyle of a Sikh and a few domestic details that Yogi Bhajan-ji reintroduced into our modern lifestyle, such as celebrating the institution of motherhood and giving a new mother a break from chores for the first 40 days of infancy.
There is also a section of 20 pages of Gurbani in English that enriches and provides lucid insight into many of these areas.
And lastly, there is a brief chronology of about 800 amazing events that have happened from 1200-2009 that affirm and contribute to our collective sense of ekta, hukam, sarbat da bhalla, the simple sanctity of the human form, world peace, and the empowerment and dignity of humankind.
Thanks for asking.