On Halloween night, a Wattpad fanfic writer receives a mysterious message in her inbox: WHATEVER YOU DO, DON'T READ THIS... She should've listened.

Ari Callahan has no idea how to talk to boys -- or how to talk to anyone for that matter. Enter Zac, the cute new guy in town who won't stop texting her. But is his interest real, or does he have a hidden agenda? ***** Found as a young child washed up on the beach, 17-year-old Ari Callahan has never uttered a word out loud to anyone -- not even her adoptive family. Psychologists have diagnosed her with a condition called selective mutism, but Ari can't help identifying with her namesake character, Ariel, the little mermaid in the fairytale whose voice was stolen by a sea witch. Mermaid-obsession aside, Ari's silence makes socializing tough. She's never had a boyfriend or been asked out on a date. Not until Zac, the confident new arrival in town, asks for her number. But Zac has his own reasons for texting with Ari. He's part of a movement to sabotage the artificial music app called SirenSong, threatening to render human singing obsolete. Zac's collaborators have scoured the globe in search of a singing voice perfect enough to break the SirenSong spell, and their search has led them straight to Ari's beachside town. Will her relationship with Zac help Ari find her voice and unlock the secrets of her origins? Or will he use her and leave her high and dry? Title: Ari and Zac (formerly The Mermaid Hypothesis) Content Warning: This story contains references to selective mutism, suicidal thoughts, and early childhood trauma.

Ellie Sandberg would love to reinvent herself. When she earns a spot at an elite boarding school for young inventors, it seems like the perfect opportunity: A summer away from home, away from her overprotective parents, and away from the hopeless crush who rejected her in the final weeks of school. But no one at the Winthrop Academy Summer Maker Program is exactly as they seem-least of all the charming but mysterious Maddox Cruz. Maddox and his group members are working on a new and improved version of InstaLove, an augmented-reality app invented by a former program attendee, and Ellie soon finds herself invited to join their project. But InstaLove has a history of glitches. Weird little accidents... injuries... users wandering into places they were never meant to go... When a fellow group member goes missing, the tech trail for the crime leads back to InstaLove-and to Ellie. With no one else to trust, Ellie must race to uncover the truth and clear her name...or she might be the next to disappear.