In Search of Unicorns? August 23, 2019 Posted by: Natalie Burclaff Share this post: Monoceros, Canis Minor, and Atelier Typographique, Sidney Hall, etcher. 1825. https://www.loc.gov/item/2002695521/ In the business world, unicorns are private startups valued at over one billion dollars. However, if you search for books with the subject of