Special Counsel Robert Mueller has at least 49 questions he wants to ask Donald Trump, divided into four subject matters: campaign coordination with Russia, former FBI Director James Comey, Attorney General Jeff Sessions, and Former National Security Adviser Michael Flynn.

Read more: What Mueller wants to ask Trump and why

We have put together some extra reading material on each of the four themes. Click on the links below to learn more about Mueller’s lines of questioning.

Campaign coordination with Russia

James Comey

Jeff Sessions

Michael Flynn

Read more: The Mueller investigation compared to actual witch hunts