Donald Davidson has a reputation as a difficult philosopher. This reputation is not unfounded. Reading a Davidson essay that was referred to elsewhere (in my case, my first introduction was "Mental Events") is how most people first read him, but that's no way to get familiar with Davidson. We can object all we want to specific essays, or formulations, but Davidson's work forms one of the great systems of 20th century philosophy. Since he wrote no single book that introduces his whole philosophy, we have to scrounge around and read essays, following up interesting leads and lamenting that there is no one place to start.
Enter this book. It is missing a few important essays like "The Structure and Content of Truth" and "Thought and Talk," but that's forgivable given the accessibility of many of his most important essays in a single spot. Reading a single Davidson essay is a difficult task, and piecing together his views is even harder, but to begin unraveling the Davidsonian web it's hard to start anywhere better than here.
The editors provide a great introduction, which should help the reader orient themselves around the work. After reading a number of Davidson essays and not really understanding much beyond the surface, the introduction illuminated the basic structure of his project and made understanding Davidson a pleasure (though he is still difficult, the difficulty is rather like solving a puzzle), rather than an exercise in frustration mixed with pleasure. The editors, sadly, organized the book backwards. The truth work should come first, then the action work. But, then, I'd probably be complaining about that.
It is lacking, however, in fine-grained detail and explication. For that reason, I recommend this book in conjunction with Ernie Lepore and Kirk Ludwig's "Davidson: Meaning, Truth, Language, and Reality" for anyone interested in his philosophy. It is tough going, even with a guide, but reading Davidson is worthwhile: it's necessary to have at least a passing acquaintance with his work if you're interested in philosophy in the last thirty years; he will be remembered as one of the most important philosophers of the 20th century, and for good reason.
The only reason I took off one star is because, despite all the pros of this book, I don't really like the organization, there are essays that should be here but aren't, and the introduction could be better. But, this is nitpicking; anyone remotely interested should buy, own, and read this book with relish.