Wow, this is a book that stuck with me for all the wrong reasons, to be honest. I read 'iwishiwereheather.com' a couple years back and the plot is essentially a digital-age cautionary tale about obsession and identity. The main character, Callie, is this deeply insecure girl who becomes fixated on Heather, a popular classmate with a seemingly perfect life documented online. Callie starts a website, iwishiwereheather.com, as a shrine/fan page, but it spirals into her impersonating Heather online to get close to Heather's friends and crush. It's less a thriller and more a slow, painful unravelling of a lonely person's psyche.
The most unsettling part isn't a big twist, but the mundane horror of how her lies snowball. She catfishes Heather's inner circle, and the book digs into the emptiness behind both the curated online persona and the person obsessing over it. The climax involves a face-to-face confrontation that's more cringe-inducing and sad than shocking. It’s a pretty stark look at teenage alienation in the social media age, but I found Callie so frustratingly passive at times that it was hard to stay fully engaged.