Peter Ludlow has published in a number of areas in philosophy, linguistics and cognitive science, including the books Semantics, Tense, and Time: An Essay in the Metaphysics of Natural Language (MIT Press, 1999), Interperspectival Content (Oxford University Press, 2019), and Language, Form, and Logic (Oxford University Press, 2022). He is currently working on conceptual issues in blockchain technologies and is a Contract Philosopher at Status.im