I will try to dig it up later this afternoon and paste in in here.
My assumption is that because I share rights with Wiley, they can do as they please with the text. So from a legal standpoint I assume no agreements have been violated.
Where I do feel violated is my understanding of a mutual desire between publisher & author to sell the work. I imagine their calculation is that once publication costs have been recovered, if the book isn't a best seller it may be more worth their while to give away the book and use it to build their brand. This is completely at odds with the motivations & needs of the author, even if it is within their right.
I understand that electronic text is a non-rival good, so the following example isn't a perfect one, but it is like if you and I went in 50/50 on importing lemons to sell on the side of the road at neighboring stands. Then, the moment I recovered my costs, I began given the rest of my lemons away for free, completely obliterating your ability to sell lemons for a price, and thus removing your ability to recoup your costs. It may be legal, but it is a pretty lowly thing to do. I end up breaking even and you end up with a net negative.