Univocality

Over the weekend, I was alerted to a book on univocality called Univocity. I'm interested in univocality because of my ongoing fascination with Thomas Aquinas and the notion of analogical predication. But I doubt I'm going to buy this book. For starters, it's £30 (US$50?); and, according to Amazon's blurb, the main course itself consists of Wikipedia articles and other online resources. If the book was £10 or less, I'd be interested; but at its current price, it just seems a massive rip-off.