The Running Grave is the 7th book in Robert Galbraith (aka JK Rowling)’s Cormoran Strike series, one of the most enjoyable crime fiction series out there. It features Cormoran Strike, a British war veteran-turned-private investigator, and Robin Ellacott, who starts out as a temp but becomes his business partner. In The Running Grave, Robin goes undercover to join a religious cult on behalf of a client who is worried sick about his son. The books in this series tend not to be fast-paced thrillers, but get you into the daily lives of the main characters, with the plot/mystery driving the story forward. If you haven’t read any of the books yet, it’s best to start with the first, The Cuckoo’s Calling, published exactly a decade ago.