Being firmly rooted in the Kantian and Husserlian traditions as I am, I cannot agree with what the authors characterize as their ambitious aim in this work, which is to show that indexicality and perspectivality are "philosophically shallow." While people such as McGinn, McDowell, and others have made much of indexicality, seeing it as proof of an irreducibly first-person level of content, the authors present a deflationary view of indexicals, showing that they are just more instances of the opacity of Frege-style cases, where there's a failure of substitution of co-referring terms. Since my intuitions pull me in the opposite direction, and since philosophers are always slaves to their intuitions anyway, I will have to concoct arguments that support my intuitions and that provide reasons to re-inflate indexicals and perspectival contents.
That will take time.........
Regardless of the success or failure of the authors' more ambitious aim, I do think that they succeed in their more modest aim, which is to show that the tradition inspired by Perry's "The Essential Indexical" doesn't even have -arguments- to show for its hyper-inflated interpretation of indexicality. That is, it would be good if there were arguments, and they were bad ones with lots of holes in them. Then we might be able to start somewhere. Instead, there are - as the authors show - at times no arguments to be found. Instead, what we find are nothing more than just cases that could just as well be instances of the already familiar Frege's puzzle. Moreover, they show that much greater care is needed to provide some kind of taxonomy of indexicals, and to show how (and whether) they relate. This needs to be done before we can arrive at sweeping conclusions about the philosophical significance of the phenomenon of indexicality.
If you're already skeptical about the far-flung claims being made on behalf of first-personal contents, you should read this book. If you are already a committed believer in the existence and far-reaching philosophical significance of such contents (as I am) you should -really- read this book. It provides a good kick in the arse of an at times complacent tradition of just referring to Perry in a footnote, as if his seminal paper had clearly and unambiguously established groundbreaking claims about an indissoluble connection between, say, agency and indexicality. The authors remind us that these claims still need to be carefully argued for, one link at a time (and they helpfully show what some of the links to be established are). The acid that this book pours on us all can seem like a curse; but it is actually a blessing in disguise - a catalyst that stimulates us to clarify and sharpen our arguments. And, of course, to concoct arguments where we don't really have any.
Oops.