As a publisher Random House supports making as many of our books as possible widely available in the eBook marketplace, to be read anywhere and on any device. If you have questions about ongoing format support for a specific purchase, we suggest that you contact the retailer from which you made the purchase.
For those of you inquiring about digital products with no encryption (aka DRM or digital rights management), Random House has recently announced that our downloadable audio catalogue is available in DRM-free formats. We require that all eBooks are encrypted with whatever encryption system the retailer uses.