What are the Luanda Leaks?

Leak has shown how Africa's richest woman built her empire, but how did it happen?

Isabel dos Santos, the billionaire daughter of the former president of Angola, claims to be a self-made businesswoman, but a cache of documents investigated by the Guardian and partners appears to tell a different story.

The Luanda Leaks are a trove of 715,000 emails, charts, contracts, audits, and accounts that help explain how Dos Santos built a business empire worth an estimated $2bn.