*Vague spoiler alert* ⚠️
This one was hard to put down. The protagonist was clearly an unintentionally unreliable narrator, unsure even herself if her behaviors and actions were symptomatic of her insomnia, or "going mad" as her mother did. Keep an open mind when reading this one, or the twist at the end might just turn you off. I personally enjoy twists that use time theories, so I really enjoyed how it all wrapped up in the end.