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Author Ruth Ware spoke exclusively to PEOPLE at the London special screening of The Woman in Cabin 10

The film is based on Ware's 2016 novel of the same name and stars Keira Knightley

The Woman in Cabin 10 begins streaming Oct. 10 on Netflix

Seeing her words brought to life has been a “surreal” experience for author Ruth Ware.

Speaking exclusively to PEOPLE at the London special screening of The Woman in Cabin 10 — the Netflix adaptation of her 2016 novel of the same name — Ware, 48, shared what it felt like seeing the film for the very first time.

“Honestly, like an out-of-body experience. It was really crazy seeing it when I watched the film for the first time,” Ware says. “But I think the moment when I sort of realized, 'oh my gosh, this is all real' is when I

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