A book about blogging released in 2004, might as well be one of the dead sea scrolls considering how fast blogging and blogs have changed.  However, Biz Stone’s “Who Let The Blogs Out?” is likely a classic. It is readable, useful (still!) and carefully lays out the basic premise of all collaborative software. No wonder Biz went on to become part of some, ehem, pretty interesting web companies (via Biz Stone’s blog).  And I’m sure having such a cool name helped