House-sitting. Buried bones. One very distracting immortal detective.
Immortal by Morning by Lynsay Sands continues the Argeneau saga with Abril Newman, whose terrible luck reaches new heights when a simple house-sitting gig turns into a murder investigation. Enter Detective Crispin, an ancient immortal who's been waiting 3000 years for his life mate - and suddenly his biggest challenge isn't solving the case, it's concentrating on anything other than the woman who's turned his world upside down.
Title: Immortal by Morning by Lynsay Sands
Publish Date: July 29, 2025
Series: Argeneau #37
Genre: Paranormal Romance, Vampire Romance, Urban Fantasy
Main Characters: Crispinus Delacort and Abril Newman
Rating: ★★★★★ (5/5)
Buy on Amazon | Goodreads
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Book Description
Being an immortal rogue enforcer is never easy. But when human bones are found buried in a residential garden—and they happen to be discovered by your life mate—things get even more complicated in this latest installment of New York Times bestselling author Lynsay Sands’s wickedly alluring Argeneau vampire series.
Crispinus Delacort is an immortal rogue enforcer and a homicide detective. But in his quiet city, he’s more likely to be rounding up truant teens than investigating murders. So, when he learns that human bones have been found in the garden of a sprawling rural home, it’s unexpected to say the least.
Abril Newman can’t believe her bad luck when she discovers a body buried on the grounds of her boss’s home, while chasing after Gina’s mischievous lab Lilith. She was just supposed to be house-sitting for a few days! And then Detective Delacort arrives. She knows she shouldn’t be thinking about love when there’s a crime scene outside the door. But ignoring her attraction to gorgeous Crispin is easier said than done.
When Crispin realizes that a rogue is involved, he knows this won’t be a simple investigation. Especially because he’s so distracted by Abril’s presence that all he wants is to kiss her senseless in every room of the manor. But he can woo her, solve the case, and stop a dangerous rogue by morning...right? All in a day’s work.
BONUS CONTENT: Scroll down for my exclusive Argeneau Reader's Guide - perfect for newcomers and longtime fans!
My Review
Thirty-seven books! Can you believe we're here and I'm still absolutely obsessed with this series? I've been with the Argeneaus since the very beginning, and honestly, this book reminded me why I fell in love with Lynsay Sands' world in the first place.
What worked beautifully for me was the immediate chemistry between Abril and Crispin. None of that drawn-out "I can't possibly be attracted to this person" nonsense - just pure, instant life mate recognition and the chaos that follows.
Abril's situation really intrigued me, though I wish we'd gotten more backstory. She's clearly devoted to her boss to an almost concerning degree. There was something almost puppet-like about the dynamic that made me want to dig deeper.
Poor thing has the worst luck though! I lost count of how many accidents she had throughout the story. What I didn't expect was how these "accidents" would tie into the larger mystery in such a clever way.
Crispin was exactly what I wanted in an immortal hero. Ancient, experienced, but completely thrown off his game by finding his mate after millennia of waiting. The fact that he's both a detective and an enforcer gives him this perfect skill set.
The mystery element kept me completely engaged. Sands crafted a tragic backstory involving a desperate husband's attempt to save his dying wife that goes horribly wrong. It was heartbreakingly human.
And Lucian! That man never changes, does he? His dry commentary throughout the investigation had me laughing out loud. Some characters never get old, and he's definitely one of them.
Character Spotlight
Abril won me over with her quiet resilience and chaotic charm. Between juggling home renovations, a string of bizarre accidents, and caring for her boss’s high-maintenance dog, she keeps moving forward—even when the odds (and the corpses) start to pile up. There’s more to her loyalty than meets the eye, and it kept me curious throughout.Despite her string of bad luck and mysterious devotion to her absent boss, she handles every curveball with surprising grace.
Crispin brings that perfect immortal energy—ancient and capable, yet completely undone by meeting his lifemate. As both detective and enforcer, he’s used to being in control, which makes his vulnerability around Abril even more compelling. He balances stoicism and sincerity in a way that makes him an instant favorite.
Lucian remains the gruff, unshakable presence longtime fans know and love. He walks into every scene with a sigh and a sarcastic remark, but beneath the dry humor is someone deeply committed to protecting his people. His no-nonsense approach to danger—and romance—offers both comic relief and emotional grounding.
Gina, Abril’s demanding boss. Her absence sets everything in motion, leaving Abril to manage the estate, oversee construction, and care for her energetic dog while trying to stay on top of every tiny detail. Gina is controlling, impatient, and quick to throw a tantrum if things don’t meet her on’t go her way (or on her timeline). Her influence adds pressure and stakes, even from afar.
Lilith, the large yellow Labrador retriever, is pure chaotic joy, she might just be the best unintentional matchmaker in the Argeneau universe. She’s the reason Abril and Crispin cross paths, and her antics—from bolting after wildlife to instigating awkward encounters—keep the story light and warm. In a world of fated love and rogue immortals, Lilith proves that sometimes the most powerful matchmaker is a dog with a leash and a mission.
Setting & Atmosphere
The rural property setting provided a cozy but suspenseful backdrop. The house practically became a character of its own, full of charm, secrets, and unexpected danger.
Series Context
As someone who's read every Argeneau book, I can say this one feels both comfortingly familiar and refreshingly new. Perfect for longtime fans and curious newcomers alike.
Themes
Love's Dark Side: Desperate love can create unintended monsters.
Destiny vs. Choice: The life mate concept walks a delicate line between fate and free will.
Survival vs. Humanity: Explores what we lose when survival instincts take over.
Click to Expand: Understanding Argeneau Connections: A Reader's Guide
Origin: Atlantis & the Nanos
Immortals descend from Atlanteans who used nanos to heal and enhance their bodies. These nanos require blood to function, which led to vampire myths. Immortals are not undead—they're biologically advanced and virtually ageless.
Family First: Argeneau Bloodlines & Beyond
The Argeneau Family Core
- Marguerite Argeneau is the matriarch and an infamous matchmaker.
- Her children — Lucern, Bastien, Etienne, and Lissianna — appear early in the series and expand the lineage.
- Lucian, their uncle, is one of the oldest living immortals and a longtime enforcer.
- Bastien runs Argeneau Enterprises, the source of synthetic blood packs for immortals.
The Notte Lineage
- A powerful Italian immortal family that intertwines with the Argeneaus.
- Their stories often involve ancient European secrets and lost descendants.
- The Notte family has matchmaking tendencies too.
Enforcers & Rogue Hunters
- A policing group of immortals who ensure secrecy and track down lawbreakers.
- Characters like Lucian, Mortimer, Anders, and Bricker often reappear as supporting heroes.
- Expect mystery, danger, and justice served immortal-style.
Recurring Themes & Tropes
- Lifemates: A one-in-a-lifetime genetic match that sparks uncontrollable need and affection.
- One Bite Turns: Turning a human usually involves one bite—often dramatic and life-saving.
- Second Chances: Many characters find love after centuries of loneliness or grief.
- Science Meets Myth: Genetic testing, blood management, and ancient lore collide.
Character Spotlights
Marguerite Argeneau
- Full Name: Marguerite Argeneau
- Role: Matriarch, matchmaker, and eternal meddler
- Age: Over 700 years old
- Lifemate: Julius Notte
- Spotlight Book: Vampire, Interrupted (Book 9)
"Everyone deserves love—even if they don't know it yet."
Lucian Argeneau
- Full Name: Lucian Argeneau
- Role: Council Enforcer, Rogue Hunter leader
- Age: Over 2,000 years old
- Lifemate: Leigh Gerard
- Spotlight Book: Vampires Are Forever (Book 11)
"Love doesn't make you weak. It makes you willing to fight harder."
Justin Bricker
- Full Name: Justin Bricker
- Role: Enforcer; known for wit and charm
- Age: A few centuries old
- Lifemate: Stephanie McGill
- Spotlight Book: About a Vampire (Book 22)
"I may joke a lot, but I know when something's real—and you're it."
Quick Tip
New to the series? Start with any book featuring a mortal protagonist being turned—it eases you into the world. Returning readers will love the cameos and callbacks in every installment.
Note
This guide is exclusive to Forever Book Lover and designed to help you enjoy the series—whether you're reading Book 1 or Book 37.
My Final Thoughts
Immortal by Morning delivers everything I want from an Argeneau book: chemistry, mystery, humor, and heart. Sands nails the formula once again—and I’ll be back for Book 38 without hesitation.
About the Author
Lynsay Sands is the New York Times and USA Today bestselling author of the Argeneau/Rogue Hunter vampire series, as well as numerous historical romances and anthologies. She's been writing since grade school and considers herself incredibly lucky to be able to make a career out of it. Her hope is that readers can get away from their everyday stress through her stories, and if there are occasional uncontrollable fits of laughter, that's just a big bonus.
Join the Conversation
Are you still loving the Argeneaus as much as I am? Who’s your favorite immortal couple? Let me know in the comments!
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