She is one of the pioneers in virtual ethnography research, her book is number one recommended to read for every researcher who wants to do an ethnographical study online. The book was published in 2000, a lot have changed within 14 years, the study was on internet forums, blogs & mass media. The revolution of social media needs a lot to be done for an adequate methodology. However, it is a : must read book in both fields: qualitative method in general & virtual ethnography precisely.
A bit dated (or a lot dated...) in quite a few ways, but ultimately useful for anyone working in ethnography using internet sources for their research. There's a reason it's a must-read, must-cite for everyone in the field, after all.