What we talk about when we talk about “book blogging”

What compels a person to blog about their reading experiences, and what happens after they do? Do writers blog because they just can’t help themselves, or is blogging the necessary evil twin to the book they preferably would be working on? What’s the deal with the book bloggers community, and would/should writers want to join the conversation?

Anna Sellin, J. S. Meresmaa, Nahal Ghanbari, Nic Clarke, Thomas Årnfelt