2Pac's Official Site
This is a great site full of updated news, clips, poetry, and discussions.
2Pac's Rolling Stone Biography
Along with a biography, Rolling Stone also includes a great news archive for everything Tupac.
Robert Sam Anson, "To Die Like a Gangsta," Vanity Fair (2013)
Here's a great piece on Tupac, his controversial life, and his controversial death.
Chuck Philips, "Tupac Shakur: 'I Am Not a Gangster,'" Los Angeles Times (1995)
A 24-year-old Shakur gives a great Q&A in this 1995 article, about a year before his death.