Archangel Reyla is a low-key Archangel enjoying a quiet afterlife of slaying shadowlings, granting human wishes... and crocheting. Out of the blue, she gets a text from Archangel Gabriel, who she's never met before. Because of her high rating and aptitude for fighting (Reyla's great with a bow), she's being scouted as a possible member of The Echelon, an elite group of Archangels who are privy to the afterlife's secrets. Archangel Gabriel will be in charge of training Reyla, as well as another Echelon candidate named Mikah. Gabriel makes her nervous, and Mikah is critical of her in a way that's highly frustrating. Not only that, she doesn't want the extra attention! Still, Reyla decides to undergo the special training to sate her curiosity. After all, what's the worst that could happen? School for Spirits: Loneliest Archangel features a more adult set of characters, while retaining the spirit (pun intended) of the series. Content warning: Mentions of suicide, sexual assault

Marge is a 57-year-old grocery store manager. In a world where robot workers are more common, she's one of the last human employees. Her best friend is her niece, Raven, who struggles with depression. Hoping to shake Raven out of a major depressive episode, Marge agrees to enter Odyssey of Dragons, a complex VR fantasy world that emulates real life. Marge enters the “game” as a man, a handsome young mercenary, and the experience is more intense than anything she expected. CW: Attempted suicide.

Lucy Alvarez, a recent Spirit School graduate, is presented with a unique opportunity. She's asked to become one of Archangel Azrael's "Helpers," a group of spirits who guide the recently deceased to the afterlife. Lucy is definitely no stranger to death. She lost her mom when she was twelve, and at age fifteen, she was diagnosed with cancer, a disease that ultimately claimed her life. She's an obvious choice to work with the Angel of Death. To become a Helper, Lucy undergoes training with Archangel Azrael himself. The Angel of Death is a handsome enigma, cold yet compassionate, and difficult to befriend. School For Spirits: Angel of Death is the fourth book in the Spirit School series.

Orias is a fallen angel, condemned to wander Earth for all eternity. Most angels would be ashamed of such a status, but Orias flaunts it. A rebel and a trickster, Orias is proud of what he is, and has no desire to return to the world of spirits... until he's approached by his old friend Sandalphon, who begs him to change his ways. Getting back into Archangel Michael's good graces won't be easy. First, the rebellious Orias will have to complete a few missions as a spirit guide, and prove he can be a good boy. But can he? Orias is paired with Kate, a lonely young girl who becomes his reluctant new partner. Unfortunately, they have nothing in common.

Lucy Alvarez, a recent Spirit School graduate, is presented with a unique opportunity. She's asked to become one of Archangel Azrael's "Helpers," a group of spirits who guide the recently deceased to the afterlife. Lucy is definitely no stranger to death. She lost her mom when she was twelve, and at age fifteen, she was diagnosed with cancer, a disease that ultimately claimed her life. She's an obvious choice to work with the Angel of Death. To become a Helper, Lucy undergoes training with Archangel Azrael himself. The Angel of Death is a handsome enigma, cold yet compassionate, and difficult to befriend. School For Spirits: Angel of Death is the fourth book in the Spirit School series.

Ever since she's been dead, Kaylene's had one dream: to become an Archangel. Her training has been her focus, her obsession, her passion—and now she's only five missions away from making the dream come true. Kaylene's dedication has made her one of the most popular Archangel candidates. She has a legion of fans and a portfolio of glamorous pictures. Every magazine wants to interview her, every spirit wants to be her, and no demon can withstand her blade. Kaylene can handle anything that comes her way, but she'll face her biggest challenge yet: a rebel student named Ben. Almost an Archangel is the sixth book in the Spirit School series.

Nicholas is a profoundly lonely man, mourning the loss of a dead wife and a daughter who no longer loves him. His best and only friend is Lillie, a spirit who is always at his side. They do everything together, he just can't see her. Lillie has been Nicholas' spirit guide for a long time, and knows everything about him. She understands his pain, forgives his mistakes, and knows his wishes... and it's her job to make them come true. This novella is a spinoff of the YA series "School for Spirits," and can be enjoyed as a standalone story.