Krzyk by Blake Crouch

Set in a world where reality is malleable and the boundaries of time and space are blurred, the narrative follows a protagonist who is thrust into a mind-bending journey of self-discovery and existential exploration. As they navigate through a series of alternate realities and face the consequences of choices made in different timelines, they grapple with the essence of identity and the nature of existence itself. The story is a thrilling blend of science fiction and psychological drama, challenging the reader to question the very fabric of reality.