First and foremost it contains interviews with all the major players... Ron, Tim, Dave, Steve Purcell, Bill Tiller, Dom (at least these are the ones I know about, most likely there's many more). The book is being edited by Jeremy Parish of Retronauts-fame, who also conducted most of the interviews, as far as I know.
They have already updated the page to include the last version with yellow/orange logo. It also includes a logo on the top that wasn’t there before. Looks way better now that we can see a more detailed version.