The argumentation is uneven, but the good stretches contain
enough new ideas to make it a good read. The core of
the book is the notion that referential links have to
be *maintained*. A subsidiary theme is that your metaphysics
should satisfy two constraints: it should make sense of
computer science, and it should allow for the world being
intrinsically very, very messy. If you like Bruno Latour,
and you're interested in metaphysics and epistemology, you'll probably like this. (If you dislike Latour, you'll probably dislike this.)