Addressing the Mind. An Ontology of Ecological Cognition is the book project I am currently working on. It summarizes and completes, at least for now, the ontological work I've been doing for the last couple of years.
It will include an account of the locative/ecological specificity of cognition. In other words, I argue that there is something unique about the way in which cognition "deals" with locations: with this seemingly trivial fact that the cognizer has an address in space and the cognized entity also has an address and that latter differs from the former.
Over the course of this "dealing" with locations a specific realm comes about, which is referred to as cognitive niche. The book ends with a semi-formal ontology of the cognitive niche.
More about this ongoing project soon to be found here!