Earlier this week i finished reading .NET System Management Services. Although the book was published back in 2003, it still contains a lot of useful information on using the classes in the System.Management namespace. I did not like the fact that the author really made the effort to explain each line of code in the book. On the other hand, the book contains a lot of useful tips that help with writing WMI queries, generating managed classes around WMI classes (and objects) and even applications that query SNMP via WMI. All in all, i can recommend the book if you are going to use the System.Management API.