Since there are a lot of comments here from people who were interested in PCM but not sure about buying it, I'd like to remind everyone that, if you have access

Since there are a lot of comments here from people who were interested in PCM but not sure about buying it, I'd like to remind everyone that, if you have access to a university library, then it'll definitely have it; and your public library might not have the book, but can probably get it by ILL (a badly undervalued resource, in my experience). A lot of contributions are also available from their individual authors online. Its editor, Timothy Gowers, also has a very nice blog https://gowers.wordpress.com https://gowers.wordpress.com which is worth reading by specialists and non-specialists alike. (However, as brilliant as Gowers is, I think neither he nor anyone else could have dropped the book in your lap two decades ago, before it was compiled. :-) )