just incase you were wondering (becuase by now I would assume you've guessed) that the book project is on hold currently until the economic situation in the USA sorts itself out. Between publishers and printers changing hands and editors running a billion other projects, mine has been pushed down the list... but I'm still working slowly on everything so if you've found this site recently, drop me an email.
as for the challenges, to be honest - I've had no new ink and so its hard to keep reusing the same photos constantly. hopefully once we've weaned lily and sorted out our Canadian residency, I'll have some funds to get some new ink as my want list is several hours long now :)