I'm not sure what you're looking for in terms of the PAC-learning summary, but for a quick intro, there's this set of slides or these two lectures notes from Scott Aaronson. For a more detailed review of the literature in all the field up until the mid 1990s, there's this paper by David Haussler, though given its length you might as well read up Kearns and Vazirani's 1994 textbook on the subject. I haven't been able to find a more recent review of the literature though - if anyone had a link that'd be great.