What do you think?
Rate this book
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.
418 pages, Kindle Edition
Published August 12, 2021
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
Ratings & Reviews
Friends & Following
Create a free account to discover what your friends think of this book!
Community Reviews
Displaying 1 of 1 review
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 📚
Displaying 1 of 1 review