One of the greatest aspects of big companies competing against each other are the discounts they give to reatain customers. Many big ebook companies such as Sony, Kobo, and others often give out coupon codes on eligible titles to save you a fair bit of cash. Here is our April 21st roundup of codes you can use for some ebooks. Sony - 35OFF042112 - Use this to save 35% all … [Read more...] about eBook Coupon Code Roundup April 21st 2012