This is a fairly abstract book to read. There are many essays in this book that question how we should characterize our relationship with numbers, or how numbers are or are not in the world. Nearly nothing is taken for granted; at its most abstract even the relationship between mathematics and logic is questioned. Ultimately the various kinds of consistencies that are abstractly drawn are compared for structural "differences" within the relationships. Most of these are digitally produced by comparison of different domains as rational "thresholds" defined in the same manner that Alan Badiou utilizes to match mathematics and ontology. Even within math we can find kernels which serve as "ontological differences" that are irreducible.
There are a variety of different approaches here. In a big way, this volume presents a smattering of approaches and best serves as an introductory text. Doubtless much of the information presented is beyond most people's comprehension, so readership is small. But it is rewarding to see that even among analytic philosophers there remains a variety of approaches which are irreducible to one another. The multiplicity of approaches is how a particular field remains vital and renewable. There are also some surprising mentions of Kantian antinomies (alongside Skolem's Paradox and Godel's Incompleteness Theorem), which was a delightful connection, given that Kant presented philosophy as logic, an approach that this volume does well to expand on.
I rather enjoyed reading this text. There are many connections that can be made (and aren't in this text) between various conceptions and how they functionally differentiate different modalities of making sense (consistency). I would like to see a post-structural approach to mathematics, one that extends these various conceptions to apply them in imaginative and intuitive ways. After all, the foundation of philosophy, mathematics and logic relies on raw taxonomy, as John Stuart Mill's A System of Logic: Ratiocination and Induction provides expansionist evidence for. While traditionally these areas are separated by content, they remain joined at their roots, as modalities of pure categorization, and consistent extension. There is much to be gleamed from these set of relationships, as new connections allow for a more general grasp of complexity as concepts and differences can be (un)translatable given different logical domains.