Brianna Karp Writes 'Girl's Guide To Homelessness' To Offer Advice, Encouragement

04/26/2011 01:41 pm ET | Updated Jun 26, 2011

Brianna Karp thought she had it all together. At 23, the Orange County, Calif., executive assistant was employed, making $50,000 a year, and living in a cozy cottage with her mastiff, Fezzik.

But she would soon face a downward spiral.