An ear-shattering scream pierces the quiet Glasgow street as a mother stands frozen in her doorway, groceries strewn at her feet. Her son holds a bloodied knife while his father lies dead before him.

As Logan Martin begins his prison sentence for the brutal murder of his father, the eighteen-year-old’s aunt hires private investigator Teàrlach Paterson. She believes Logan is innocent and wants Teàrlach to uncover the truth.

Teàrlach’s visit to the Martin family home yields two disturbing discoveries: a pentagram etched under the carpet in Logan's sister’s bedroom, and a link to the sinister deaths of their elderly neighbours—a journal with the same ominous symbol lies in the couple's home. While ritualistic murders plague the city, bodies placed precisely on an occult pentagram, bound in intricate knots, Teàrlach and his team unearth the sinister inspiration behind the killings in a mysterious ancient map.

Then, two young women are reported missing, and Teàrlach fears the worst. He’s inching closer to a killer who is weaving a complex web of murder rooted in Glasgow’s pagan past.

But can Teàrlach stop the twisted soul from carrying out another cruel ritual? This time, one of his own is about to be in grave danger. A completely thrilling and atmospheric page-turner that will keep you reading deep into the night from a CWA New Blood Dagger Longlist author and McIlvanney Best Scottish Crime Novel Finalist.

Perfect for fans of LJ Ross, Ann Cleeves, and Val McDermid. What readers are saying about Andrew James Greig’s books:‘Will keep you on the edge of your seat… captivating, fast-paced…emotional.

’ Reader review,⭐⭐⭐⭐⭐‘Wow!!! This book blew me away!!!! Such a great thriller and totally kept me guessing!’ Reader review,⭐⭐⭐⭐⭐‘I needed this! I was on the edge of my seat the whole time!’ Reader review,⭐⭐⭐⭐⭐‘Gave me goosebumps and made me want to keep on reading. ’ Reader review,⭐⭐⭐⭐⭐'Wow.

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I could not put it down. ' Reader review,⭐⭐⭐⭐‘An absolute page turner.

’ Reader review,⭐⭐⭐⭐‘Loved this amazing novel. .

. lots of twists.

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highly recommend. ' Reader review,⭐⭐⭐⭐⭐‘With shades of Cormoran Strike, this was a story that jumped into action and kept going.

Twists and turns… atmospheric, dark and thrilling, it was a gem. ’ Reader review, ⭐⭐⭐⭐⭐‘Fast-paced with beautiful twists… loved it!’ Reader review, ⭐⭐⭐⭐⭐‘An outstanding thriller… Andrew James Greig kept the pace moving fast… the gritty tension held me from the start, and I certainly didn't expect the massive twist at the end!’ Reader review, ⭐⭐⭐⭐⭐‘A beautifully drawn tale of intrigue and menace, as dark and brooding as the loch itself…utterly compelling.

’ Marion Todd, critically acclaimed author of the Detective Clare Mackay series‘I honestly had goosebumps reading this. ’ Reader review, ⭐⭐⭐⭐⭐‘Amazing! I really didn’t want to put it down (who needs to sleep?!).

’ Reader review, ⭐⭐⭐⭐⭐‘Just Wow! What a read. Couldn’t put it down.

’ Reader review, ⭐⭐⭐⭐⭐‘Compulsive… I couldn’t put it down. ’ Reader review, ⭐⭐⭐⭐⭐‘Absolutely hoovered it up.

’ Reader review, ⭐⭐⭐⭐⭐‘Brilliant to the very last word… you won’t be able to put this book down. ’ Reader review, ⭐⭐⭐⭐⭐‘The best crime novel I’ve ever read.

’ Reader review, ⭐⭐⭐⭐⭐. .