[From Make Use Of]
O’Reilly, a top technology publisher, is offering a 50 percent discount on its top-performing, five-star e-book titles for just a couple more days. This deal expires on August 16 at 11:59 p.m., so you better act quick. Make sure to use the discount code WK5STAR to receive half-off when purchasing your e-books.
There are almost 20 titles for you to choose from, all of them being the most well-reviewed books on O’Reilly’s virtual book rack. They are also entirely DRM-free. You get free lifetime access, multiple file formats, and free updates. O’Reilly includes Dropbox syncing too.
This discount cannot be combined with any other offers, but it is definitely worth taking advantage of.