Excellent. I've finally found a succinct description of what agency pricing is and a little bit about it on lovely NPR (here). But I still haven't found a good article about the anti-competition and anti-trust lawsuits underway that relate to the use of agency pricing in the e-book market.

There's an article in the FT today about that sort of thing and about the Amazon $5 rebate if you leave a bookshop empty-handed, but a) you might find you have to register (for free, though) in order to read it and b) I found it curiously vague and confusing. At any rate, it's here and it's called "Don't Make Amazon a Monopoly".