Der Spiegel digs deep into the background and contents of the Steele Dossier. A snippet:
Steele’s Russia dossier lies at the heart of the scandal. It reads today like a preview of everything that has happened since then. Many of the names that dominate the Trump-Russia affair appeared for the first time in the report, like Aras Agalarov, for example, a Russian property mogul. There’s also Trump’s former lawyer Michael Cohen, former campaign adviser Carter Page, Trump’s former national security adviser, Michael Flynn, and Rosneft Chairman Igor Ivanovich Sechin. They all appear in Steele’s report — and they’ve all become important for Robert Mueller’s investigation.