Private Investigators Cormoran Strike and Robin Ellacott take on another case in the 7th book of the series. A worried father seeks Strike's help in extracting his son from a religious cult in Norfolk. When Strike uncovers sinister secrets and unexplained deaths, Robin infiltrates the group undercover, a task that might be much more dangerous than she anticipates.

Fans of the Strike series will absolutely love J. K. Rowling's latest entry. As with the rest of the series, the developing relationship between Strike and Robin is well-done and leaves you coming back for more. However, The Running Grave delights with one of my favorite cases of the series, an in-depth look at a religious cult. The extreme length of the book actually felt justified this time, allowing Robin to fully dive into her undercover assignment. If you aren't a fan yet, it's not to late to pick up a copy of The Cuckoo's Calling.