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What is the best source(paper/book) for an introduction to Forcing?

What I found already is Chow, some papers of Cohen himself etc.

Averroes2
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    Definitely not Cohen's papers. Never, ever, ever, read "the original" when a technique exists longer than 20 years and was used extensively. – Asaf Karagila Jun 03 '20 at 10:27
  • https://math.stackexchange.com/questions/3576680/prerequisites-for-forcing might also be helpful. – Asaf Karagila Jun 03 '20 at 10:30
  • I read Cohen's paper and couldn't make heads or tails of it. Would avoid. – AlvinL Jun 03 '20 at 10:33
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    @Alvin: That's because in order to read Cohen's paper and have it useful for reading further books and paper where forcing is used, one needs to also read the many papers and books that followed Cohen's work. So one needs to understand ramified forcing, the weak forcing relation, etc., which is generally not how you should learn about forcing, but rather what you learn when you want to learn the history of forcing instead (which begins with learning forcing from a modern perspective, of course). – Asaf Karagila Jun 03 '20 at 10:44

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