I’m currently revising a research monograph, ​​​​​​What Functions Are and Why They Matter. It will be published by Cambridge University Press in early 2019. It sets out my theory of biological functions and explores its relevance for various problems in the philosophy of science, philosophy of mind, and philosophy of medicine. It serves as a companion volume to my last book,  A Critical Overview of Biological Functions , which was a short, opinionated survey of the functions debate.  
I’m also in the early stages of writing a book on the history and philosophy of twentieth-century American psychiatry, ​Madness as Dysfunction and as Strategy. You can find some working notes here .