Melissa F Olson Books in Order

Scarlett Bernard is a null, hired to erase the supernatural traces that vampires, witches, and werewolves leave behind in Los Angeles. When a grisly murder points back at her, she must work with homicide detective Jesse Cruz to catch the real killer.

Days before Christmas, two murdered witches drag Scarlett back into Jesse Cruz's investigation. The case leads toward Olivia, Scarlett's former mentor, and forces her to reopen parts of her past she would rather leave buried.

Healing witch Sashi Noring knows better than to meddle in werewolf business, but she cannot ignore an abused shapeshifter who needs help. This prequel novella shows how one act of compassion turns into something much bigger and much more dangerous.

Scarlett's decision to make Eli human has thrown the Los Angeles werewolf pack into chaos. Now a rogue werewolf is on the loose, and Scarlett must work with both Eli and Jesse before hunters on both sides make the body count worse.

Pregnant Chicago PI Lena Dane takes a heartbreaking case from a fourteen-year-old boy searching for his missing father. What starts as a quiet investigation turns into a cross-country hunt with a killer on Lena's trail.

After her twin sister's murder, former Army sergeant Lex Luther will do anything to protect baby Charlie. When Charlie becomes a target and Lex discovers she is a boundary witch, grief gives way to a dangerous new life in Boulder's hidden supernatural world.

Now inside Boulder's Old World, Lex is hated by almost everyone and trusted by almost no one. A case involving two missing vampires pushes her deeper into boundary magic, supernatural politics, and the cost of keeping Charlie safe.

When Lex Luther's dead twin appears with a message about Jesse Cruz, Lex heads to Los Angeles looking for the truth. This crossover novella pulls old secrets into the open and ties the Scarlett and Boundary books closer together.

A new threat is stirring inside Colorado's Old World, and Lex is right in its path. As old grudges flare and boundary magic turns deadly, she has to protect her family without becoming a weapon for someone else.

Alex McKenna arrives in Chicago to lead the Bureau of Preternatural Investigations just as children vanish and agents start dying. Olson turns vampire fiction into a tense federal procedural with a hard, grim edge.

Scarlett travels to Las Vegas to investigate a vampire-themed stage show that may expose the Old World to humans. Between missing vampires, old legends, and a city built on spectacle, the job turns far deadlier than it looked.

On the eve of the Vampire Trials, Scarlett gets a blood-soaked message from Molly, the vampire roommate who seems to have butchered twelve human students. Scarlett has one day to prove Molly was set up before the Old World decides the case for her.

Three weeks after Nightshades, the Chicago BPI is called to a small Illinois town where a young man accused of being a shade vanishes in a bloody jailbreak. Alex McKenna's team has to decide whether they are chasing a monster, a conspiracy, or both.

Alex and Lindy are already under internal investigation when the BPI's captive vampires break free. With enemies closing in from every side, the final Nightshades book turns into a full chase with Chicago hanging in the balance.

Scarlett depends on two things, her null power and Shadow, the fierce bargest at her side. When Shadow is stolen and Jesse is nearly killed in a psychic attack, Scarlett is dragged into a revenge plot with mythic teeth.

A favor to Wyoming werewolves sends Lex hunting for two missing pack members. The search widens into a larger conflict that could reshape the balance of power across Colorado and beyond.

Still carrying the damage from Wyoming, Lex travels to Atlanta and finds a city crowded with ghosts and old wounds. The deeper she digs, the clearer it becomes that the attack she is facing is unlike anything boundary magic has thrown at her before.

Told through diary entries, this novel follows Scarlett as she tries to balance null power, supernatural politics, and new motherhood. It is more intimate than the earlier books, but the Old World does not stop making demands just because she is on parental leave.

This collection returns to the Old World through eight linked stories featuring side characters, old allies, and uneasy friendships. It is a smart bridge book, filling in emotional gaps and showing what happens between the bigger crises.

A coordinated attack on nulls across the country turns fear into open conflict. Scarlett and Lex are forced into the same widening crisis, where every alliance matters and the Old World's hidden rules start breaking apart.

Single mother Tess Halliday thinks she has hit bottom, then learns she has inherited a sentient island. This dark fantasy comic throws her and her children into a strange refuge filled with gods, monsters, and family secrets.

Sashi and Will head to Las Vegas hoping for distance from Old World trouble and a chance to reconnect with their daughter Grace. Instead they land in a vampire's trap that turns family history and healing magic into part of the game.

This feminist horror retelling moves between Elizabeth Frankenstein's life in 1816 and Heqet Saville in the present day. Murder, grief, disability, and the story behind the famous story all fold together in unsettling ways.