A forthcoming book by Andrew Weissmann, one of special counsel Robert Mueller’s top prosecutors, will provide an insider’s view into the Russia investigation.

Random House formally announced on Monday that the book, Where Law Ends: Inside the Mueller Investigation, will be published on Sept. 29, less than two months before the 2020 election. It also came two days after Mueller wrote an op-ed defending the Russia investigation that has come under constant attack by President Trump and his allies.