Books about stalker girls? (or guys!)

Hey! Just recently getting into this genre because of its proximity to horror, been having a great time exploring. I've been on the prowl this past year for books about stalkers or "obsessive about another person"-style characters, and I was hoping this sub might be able to recommend me some more. Stalkers or victims perspective are both good!

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Books I have read (not all WGL) with this as its main subject have been:

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Loner (Teddy Wayne)

This Immaculete Body/Creep (Emma Van Straaten)

You (Caroline Kepnes)

Esther is now following you (Tanya Sweeney)

Creep: A love story (Lydia Day Peñaflor)

The Collector (John Fowels)

The perfect girlfriend (Karen Hamilton)

Penpal (Dathan Auerbach)

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Thanks a lot! <3

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