In honor of May 4th, the Day Against DRM, all O’Reilly, No Starch, and Rocky Nook e-books are 50% off today only. (And, needless to say, they’re multiformat and DRM-free.) Enter the coupon code DRMFREE at the checkout to take advantage of this opportunity.
No matter your feelings about DRM, that’s quite a good price for what O’Reilly has to offer. If they have any e-books you’ve been thinking about getting, this would be a good time.