Here are our bios from http://tractionbook.com/ Authors Gabriel Weinberg is the Founder & CEO of DuckDuckGo, the search engine that doesn't track you with over a billion searches in 2013. Previously he was the Co-founder & CEO of Opobox, which was sold to United Online in 2006 for $10 million. Weinberg is also an angel investor and has been featured on CBS, FOX, the Guardian, the Washington Post and many more. He holds B.S. in Physics and an M.S. in Technology and Policy from MIT. Justin Mares is the former Director of Revenue at Exceptional, a software company that Rackspace acquired for 8 figures in 2013. He has previously founded two startups (one acquired, one bust) and runs a growth meetup in San Francisco. You can find his writing on marketing and personal-development on his blog, justinmares.com.