If you're interested in understanding what's involved in releasing and marketing a record, this is a great book to get. It's a bit pricey, but there are old editions for cheap too. It covers, in easy to understand detail, basically every aspect of a record release. It will also give you a good understanding of marketing in general, like an intro to marketing class in college would. It even serves as a great resource to consult and look back at when you need a reminder of how things work. It would be an especially great read for anyone interested at becoming a manager or artist or working at a record label.