If you want a world religion`s expert on the Sikhism and Dharma (why you need an I explananation, i dont know, clearly stated in the guru granth) you can read W. H. Mcleods book: Exploring Sikhism: Aspect of Sikh Identity, Culture and Thought....

Clearly lays out the view of Sikhism, and how all Guru`s believe in a larger dharmic thought, that each and everyone practiced.

Dont be a surface sikh. Dont listen to the popular youth opinion and ignore facts. You become more at peace with your religion and yourself when you accept it.

http://www.amazon.com/Exploring-Sikhism-Aspects-Identity-Culture/dp/0195658566/ref=cm_lmf_tit_19/002-5948648-7460841