I’m enjoying MusicTech Focus - a series of popular “in-depth guide(s) for the creative musician” written and compiled by MusicTech Magazine’s mastering experts. A little pricey at £8.99, but then they do include DVDs of files and examples. They’ll be a useful set of guides for students of music technology but no substitute for hands on experience. They’ll probably have a limited shelf life as they’re dependent on application versions available today.