Don't Summon the Demon. Nanny For Nightmares, #3

He's the Warden of the Void. She's a librarian who shushes eldritch horrors. Silence has never been this loud. Cleo Hargrove prefers books to people. Books are quiet. Books have spines that don't ache. Books don't try to eat you-usually. As the head archivist of the University Occult Library, she runs a tight ship. But when she gets "downsized" by a department head who thinks necromancy is a "growth industry, " Cleo finds herself with a new, mysterious employer.
The client? Malphas. He is the Warden of the Void, a demon lord of shadow and silence who guards the barrier between reality and Nothing. He is terrifying, ancient, and looming. His problem? His daughter, Lilith, is a spider-child who walks on the ceiling and refuses to come down. And his library-the repository of all forbidden knowledge-is a disaster zone of uncatalogued scrolls and screaming grimoires.
Malphas expects Cleo to scream. He expects her to run. Instead, she puts on her reading glasses, hands him a "Quiet Please" sign, and gets to work. But as Cleo tames the library and connects with the misunderstood Lilith, she realizes the Void isn't the only thing leaking into the house. Malphas is leaking into her heart. And when the barrier starts to fracture, threatening to erase everything they've built, Cleo has to decide if love is worth breaking the rules for.
Don't Summon the Demon is the final book in the Nanny for Nightmares series. It features a scary-on-the-outside demon dad, a fearless librarian, and a spider-kid who just wants a friend.