AFTER you read the book, you REALLY get the title. Whispers Under Ground starts up with young Abigail making Peter Grant take her out to look at a ghost. Peter brings along his friend and fellow Constable Leslie May with him to be led to the train tunnels from his home neighborhood to see the ghost and watches it get run over by what they can only describe as the Hogwart's Express thus the start of our underground adventure. Next, we get a dead American student found on the tracks of the Tube, which the murder weapon has the vestigium, or the trace imprint that magic leaves, and that brings Constable Peter May and his master of magic DCI Thomas Nightingale into the case. We also get Constable Lesley May back into the book after her unfortunate attack in the first book.
The Peter Grant series a really magical, witty series about the many different magical societies in London and features a young Constable that is assigned to a magical detail as an apprentice. Peter doesn't always get it right and having Lesley there, now also an apprentice to remind him when he's wrong brings another dynamic to this series that makes it that much better. Also, the elusive villain from Moon Over Soho, book 2 in the series, is still making his mark.
I rated this 4 of 5 stars, a really good series to get into if urban fantasy is your taste.
Whispering Under Ground by Ben Aaronovitch,
Book 3 in the Peter May Series.