Tap into your unlimited potential, defy critics, and reach your goals with this inspirational, compelling story from entrepreneur, CEO, and healthcare investor Surbhi Sarna.

Transform doubt—from others and yourself—into the rocket fuel you need to achieve your dreams. The very qualities that make you an outlier are, in fact, your strengths. In Without a Doubt, entrepreneur Surbhi Sarna shares her inspiring story of proving the doubters wrong: how a teenage cancer scare inspired her to reimagine healthcare, founding a medical start-up to detect early ovarian cancer. As someone who was a young, brown woman without a medical degree, Ivy-league contacts, or any Silicon Valley street cred—and who had felt different throughout her life—she was often overlooked and underrated.

Undeterred, Sarna used the naysayers as ammunition to help her surpass the expectations of others—and achieve her dreams. Without a Doubt is her story of becoming a leader without an MBA, networking without a network, and raising funds when she didn’t know a single venture capitalist, teaching you how to do the same. Sarna led an all-star team to develop a life-saving medical device, sold her business for $275 million, and became a partner at Y Combinator, one of the most successful venture firms in the world. Using her own experience, she shows you how to reset when you face setbacks, how to learn the difference between feedback and criticism, and how to convince the right people to help you accomplish your goals.

Without a Doubt reveals that your power lies in recognizing the qualities that make you different and leveraging them to pursue your dreams.

Surbhi Sarna is an entrepreneur, partner at Y Combinator, advocate for innovation in healthcare, and investor. She has worked as an engineer before becoming CEO and founder of nVision Medical. nVision developed a catheter-based device for early detection of ovarian cancer and after obtaining FDA clearance, was purchased by Boston Scientific. Sarna also sits on both nonprofit and for-profit company boards, has been featured in publications such as Bloomberg, Forbes, Entrepreneur magazine, and Inc., and has received numerous awards, including being named on the Forbes 30 under 30 list and the Inc. Female Founder 100 list. She lives in the San Francisco Bay area with her husband and two children.