"The book publisher Random House recently announced that it will be releasing thousands more of its books in digital format over the next few months. The idea is that while the market for regular ol' words-on-paper books is struggling, electronic books have grown by leaps and bounds over the past year, thanks to Amazon's Kindle among other things. "
In Seminary I bought a 20 volume series of Charles Spurgeon's sermons in 1966 or about $200. Today almost all of Spurgeon sermons are on line. You can see the volumes on the top shelf. I still have them 42 years later. You now can have all Spurgeon's sermons on CD in for a low price.