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Wolf Within
After disobeying a direct order Detective Macy Gray with the Bureau of Paranormal Investigations is desperate to save her career and will do anything to prove herself. Sabotaging her chance to clear her name are rumors of a spy within the BPI and a new breed of shapeshifters that are terrorizing the city. Her innocence is put to the test when the Department of Justice sends in their paranormal team, Blood Rain, to investigate. Macy is under pressure and time is running out when she learns the team leader is from her hometown and it dredges up memories better left forgotten. There is no room for failure as Macy struggles to protect the innocent, battles accusations, and tries to keep the agent from proving her guilty.
Alpha Kayne Sinclair, agent, and team leader of Blood Rain isn't interested in the BPI, its detectives, their problems, or playing lie detector for the DOJ. That all changes when Kayne believes an enemy from his past is in the desert. Tormented by failure and fueled by the demons haunting him, he chases revenge in hopes of redemption. Until he crosses paths with Detective Gray, who draws him into the investigation with her lies, her connection to a fearsome vampire lord, and her history with the werewolf he is hunting.
Fighting against Agent Sinclair's determination to destroy her career, Macy will have to find the strength to save herself and that will mean reliving her past to accept her future.
Kayne's indecision about Detective Gray and his need for vengeance are a deadly mix and if he isn't careful, it will get him killed before he is ever granted forgiveness.
Alpha Kayne Sinclair, agent, and team leader of Blood Rain isn't interested in the BPI, its detectives, their problems, or playing lie detector for the DOJ. That all changes when Kayne believes an enemy from his past is in the desert. Tormented by failure and fueled by the demons haunting him, he chases revenge in hopes of redemption. Until he crosses paths with Detective Gray, who draws him into the investigation with her lies, her connection to a fearsome vampire lord, and her history with the werewolf he is hunting.
Fighting against Agent Sinclair's determination to destroy her career, Macy will have to find the strength to save herself and that will mean reliving her past to accept her future.
Kayne's indecision about Detective Gray and his need for vengeance are a deadly mix and if he isn't careful, it will get him killed before he is ever granted forgiveness.
387 pages, Kindle Edition
First published August 1, 2021
2 people want to read
About the author
M.A. Kastle
21 books9 followersM.A. Kastle is the author of Cascade Saga, an urban fantasy series that mixes paranormal, mystery, and romance. New releases include two new series, Crimson Moon, book one of Cascade Wolves (The Crimson Series), and Wolf Within, book one of the Moonlight Territory. Monica lives in Southern California with her family and two German Shepherds.
Instagram: @makastleauthor
Twitter: @makastle
Facebook: @makastleauthor
Instagram: @makastleauthor
Twitter: @makastle
Facebook: @makastleauthor
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Displaying 1 - 3 of 3 reviews
June 4, 2025
📓 Wolf Within (Moonlight Territory Book 1)
🖊 M.A. Kastle
"A Thrilling Paranormal Ride You Won’t Want to Miss"
She’s fighting for her career. He’s chasing vengeance. But in a city crawling with monsters, the most dangerous threat might be each other.
👉 Hold onto your silver bullets and moral compasses—Wolf Within is the kind of supernatural thriller that grabs you by the throat and doesn’t let go.
👉 From the very first page, Detective Macy Gray is a character you can’t help but root for. She’s flawed, fierce, and fighting for redemption in a world where betrayal lurks around every corner. After breaking protocol at the Bureau of Paranormal Investigations, Macy finds herself under scrutiny—haunted by rumors of a mole, a new breed of shapeshifters wreaking havoc in the city, and a mysterious DOJ task force called Blood Rain sent to watch her every move. Oh, and the leader of that task force? Alpha Kayne Sinclair—brooding, dangerous, and carrying baggage heavier than Macy’s own secrets.
👉 What makes Wolf Within stand out is the seamless way it blends urban fantasy, suspense, and emotional depth. This isn’t just about things that go bump in the night—it’s about trust, trauma, and how far someone will go to rewrite their own fate. The chemistry between Macy and Kayne crackles with tension, but it’s the underlying mistrust and unresolved pasts that keep you turning the pages.
👉 The world-building is gritty and immersive, giving off a criminal minds meets supernatural noir vibe that sets the perfect backdrop for a story packed with twists, power plays, and unforgettable stakes. The plot is as layered as the characters, peeling back secrets and lies until you’re not sure who’s hunting whom—or why.
👉 This book isn’t just a read—it’s a reckoning. If you love morally gray heroes, fast-paced paranormal investigations, and stories where the monsters wear human faces (and sometimes claws), Wolf Within needs to be your next obsession.
👉 Add this one to your TBR now. Because in this world, trust is dangerous—and survival is personal.
MUST READ 📚
🖊 M.A. Kastle
"A Thrilling Paranormal Ride You Won’t Want to Miss"
She’s fighting for her career. He’s chasing vengeance. But in a city crawling with monsters, the most dangerous threat might be each other.
👉 Hold onto your silver bullets and moral compasses—Wolf Within is the kind of supernatural thriller that grabs you by the throat and doesn’t let go.
👉 From the very first page, Detective Macy Gray is a character you can’t help but root for. She’s flawed, fierce, and fighting for redemption in a world where betrayal lurks around every corner. After breaking protocol at the Bureau of Paranormal Investigations, Macy finds herself under scrutiny—haunted by rumors of a mole, a new breed of shapeshifters wreaking havoc in the city, and a mysterious DOJ task force called Blood Rain sent to watch her every move. Oh, and the leader of that task force? Alpha Kayne Sinclair—brooding, dangerous, and carrying baggage heavier than Macy’s own secrets.
👉 What makes Wolf Within stand out is the seamless way it blends urban fantasy, suspense, and emotional depth. This isn’t just about things that go bump in the night—it’s about trust, trauma, and how far someone will go to rewrite their own fate. The chemistry between Macy and Kayne crackles with tension, but it’s the underlying mistrust and unresolved pasts that keep you turning the pages.
👉 The world-building is gritty and immersive, giving off a criminal minds meets supernatural noir vibe that sets the perfect backdrop for a story packed with twists, power plays, and unforgettable stakes. The plot is as layered as the characters, peeling back secrets and lies until you’re not sure who’s hunting whom—or why.
👉 This book isn’t just a read—it’s a reckoning. If you love morally gray heroes, fast-paced paranormal investigations, and stories where the monsters wear human faces (and sometimes claws), Wolf Within needs to be your next obsession.
👉 Add this one to your TBR now. Because in this world, trust is dangerous—and survival is personal.
MUST READ 📚
March 31, 2025
Book review 📚👉
Wolf Within (Book 1 of 3: Moonlight Territory) by M A Kastle
Mystery, revenge, and paranormal intrigue collide in this thrilling start to the Moonlight Territory series!
🌙 Wolf Within is a fast-paced paranormal mystery that hooks readers from the first page. Set against the atmospheric backdrop of Northern California’s rugged mountains, the story follows shapeshifting detective Macy Gray as she fights to clear her name from espionage accusations while navigating a treacherous web of secrets.
🕵️♀️ Macy is a compelling protagonist—strong, determined, and caught in a deadly game where trust is scarce. But her greatest obstacle might just be Kayne Sinclair, the relentless investigator seeking revenge for his past. Their tense dynamic crackles with conflict, suspicion, and an undeniable pull that keeps readers on edge.
🔪 Betrayal, shifting alliances, and a hidden past add layers of intrigue, making every revelation more intense than the last. The noir-inspired tone mixed with supernatural elements creates an immersive reading experience, where danger lurks in both the shadows and the hearts of its characters.
📖 The story’s momentum never falters—each chapter leaves you hungry for more, blending action, mystery, and romance in a way that keeps the pages turning. The complex relationship between Macy and Kayne, coupled with an unfolding conspiracy, makes for an unforgettable ride.A dark and exhilarating ride through a world where justice is never black and white.
🔥 Verdict: A gripping, high-stakes paranormal mystery packed with suspense, betrayal, and electrifying chemistry!
⭐ Rating: 5/5 ⭐️
Wolf Within (Book 1 of 3: Moonlight Territory) by M A Kastle
Mystery, revenge, and paranormal intrigue collide in this thrilling start to the Moonlight Territory series!
🌙 Wolf Within is a fast-paced paranormal mystery that hooks readers from the first page. Set against the atmospheric backdrop of Northern California’s rugged mountains, the story follows shapeshifting detective Macy Gray as she fights to clear her name from espionage accusations while navigating a treacherous web of secrets.
🕵️♀️ Macy is a compelling protagonist—strong, determined, and caught in a deadly game where trust is scarce. But her greatest obstacle might just be Kayne Sinclair, the relentless investigator seeking revenge for his past. Their tense dynamic crackles with conflict, suspicion, and an undeniable pull that keeps readers on edge.
🔪 Betrayal, shifting alliances, and a hidden past add layers of intrigue, making every revelation more intense than the last. The noir-inspired tone mixed with supernatural elements creates an immersive reading experience, where danger lurks in both the shadows and the hearts of its characters.
📖 The story’s momentum never falters—each chapter leaves you hungry for more, blending action, mystery, and romance in a way that keeps the pages turning. The complex relationship between Macy and Kayne, coupled with an unfolding conspiracy, makes for an unforgettable ride.A dark and exhilarating ride through a world where justice is never black and white.
🔥 Verdict: A gripping, high-stakes paranormal mystery packed with suspense, betrayal, and electrifying chemistry!
⭐ Rating: 5/5 ⭐️
October 21, 2021
Wolf Within is a paranormal mystery featuring Macy Gray, a shapeshifting detective working with the Bureau of Paranormal Investigations (BPI). Set in the mountains of Northern California, it is book one of the Moonlight Territory series full of intrigue, noir, and romance.
Macy struggles to make her name clear off the mysterious spy rumors, while the Department of Justice creates an investigation team to seek the truth.
On the other side, Kayne Sinclair, lead of the investigation team, is after revenge from his past demons. While Kayne is determined to destroy Macy's career, she fights to prove herself innocent.
Among all this, they have a common mystery from their past that can bring them together. Thereafter, Macy goes on a path full of adventures and paranormal mysteries waiting to be solved.
The story moves in a powerful manner, an urge to keep reading on what happens next. The collision, the war and the betrayal will make the reader turn pages.
Rating: 4/5
Verdict: A gripping paranormal mystery with revenge, betrayal, and intriguing characters.
Macy struggles to make her name clear off the mysterious spy rumors, while the Department of Justice creates an investigation team to seek the truth.
On the other side, Kayne Sinclair, lead of the investigation team, is after revenge from his past demons. While Kayne is determined to destroy Macy's career, she fights to prove herself innocent.
Among all this, they have a common mystery from their past that can bring them together. Thereafter, Macy goes on a path full of adventures and paranormal mysteries waiting to be solved.
The story moves in a powerful manner, an urge to keep reading on what happens next. The collision, the war and the betrayal will make the reader turn pages.
Rating: 4/5
Verdict: A gripping paranormal mystery with revenge, betrayal, and intriguing characters.
Displaying 1 - 3 of 3 reviews