Burn Rate: Launching a Start-up and Losing My Mind, the memoir by Andy Dunn, is an unconventional and gripping story of mental illness and entrepreneurship. In his courageous and candid book, Mr. Dunn, co-founder of the ecommerce driven menswear startup Bonobos, opens up about this personal struggle with bipolar disorder that nearly cost him his business, the woman he loved, and his life.