O'Reilly Media is an American media company that publishes books and web sites and produces conferences on computer technology topics. VIP members are entitled to a 35% discount on books purchased directly from O'Reilly. VIP's also may get a discount on O'Reilly conferences and tutorials. Use code "DSUG" for 40% off Print and 50% off ebooks. (works on most books, but not on Wiley titles) DSUG2 is good for buy one ebook, get one free. (Does not work on Wiley titles)