20% off Art DRM-Free eBooks with coupon

O’Reilly is not the only online e-book store that offers DRM-free books. eBooks.com is also DRM-Free, and for October 2016, coupon code categorysalecp (that’s the coupon name) gets you 20% off on Art eBooks (along with Business, Law, Literary Criticism, and Performing Arts categories). Some photography ebooks are under Art, but I have no way of knowing exactly what percentage. This depends on how the ebooks are coded in their system. For example, a Canon 7D camera guide won’t be under Art, but something approaching photography from an art angle will likely be so. Their ebooks are available as EPUBs or PDFs, and can also be read online using a web browser