How awful it must be to release a book the week after Jeff Guinn on the same topic! However, I enjoyed this too. I‘ll make a comparison in the comments.
Cook looks a bit at the history of the Branch Davidians in Waco, but he focuses mainly on the stand-off between Koresh and his followers and the ATF/FBI then goes a bit into how this affected the current alt-right movement. I wish the connection to now had been longer than just two chapters.