DRM for books?

A relevant piece on DRM (Digital Rights Management) caught my eye, as I've just finished researching it in relation to the music industry for our Hot Topic on Copyright. I've become thoroughly disgusted in learning about a technology seemingly designed specificially to create more problems for loyal customers than I thought imaginable. Instead of working on real issues related to a product, customer service has to troubleshoot problems caused by DRM instead when it comes to downloadable tracks or subscription services. Happily, the music labels have wisened up a little bit in regard to CDs and just about abolished DRM in that sphere all together. Don't cheer yet, though. I haven't even started on video (HD DVD vs Blu-ray.. gahh) or Microsoft Vista (I've had my laptop for a little under a week and either my hard drive is failing or Vista is corrupted... I wonder which one it is...).