This volume consists of Yasuhiko Tomida’s notable essays on Locke, Berkeley, and Kant as well as a thought-provoking article written in collaboration with an experimental physicist. Tomida asserts that the logical space of the theory of ideas is originally ‘naturalistic’ in Quine’s sense of the term and that Berkeley and Kant ‘distort’ it in their respective ways, thus offering a wholly new viewpoint concerning the historiography of the theory of ideas. The revised and enlarged second edition carries one more article on Locke’s holistic logic. ‘Professor Tomida has brought some valuable, fresh insights to the reading of Locke’s text. All those interested in Locke’s account of knowledge and the implicit ontology of the Essay should examine [his work] very carefully.’ John W. Yolton ‘The author has … been arguing for his basic stance of Locke for these ten years; his reading of Berkeley certainly does have a lot going for it (and his knowledge on the texts and the secondary literature is impressive), and even if Berkeley or a Berkeleian might attempt some sort of defence against that charge of a distortion, I am not totally convinced that they’d “win”. … I always enjoy reading Tomida. … [E]verything I read by Tomida contributes to my respect for him as a Locke scholar.’ Ian C. Tipton