Geni is a genealogy and social networking site whose goal is “solving the problem of genealogy by inviting the world to build the definitive online family tree.” After creating an account, users can add and invite their close relatives to join their family tree. All Geni users can share photos, videos, and documents with their families. Geni’s Pro subscription service (available with a valid library card) allows users to find matching trees and merge those into the single world family tree, which currently contains over 80 million living users and their ancestors.