Steph, a high school student, and her virtual friends on CatNet, an online chat room run by a disguised sentient Artificial Intelligence with a fondness for cat pictures, in a near future thriller series for young adults:
Catfishing on CatNet (2019) [review] 2020 Edgar Award for Best Young Adult Finalist 2020 Anthony Award for Best Best Young Adult Novel Finalist 2020 Thriller Award for Best Young Adult Novel