Acknowledgements; Introduction; 1 Spinoza and Relational Immanence; 2 Diagrams of Structure: Categories and Functors; 3 Peirce and Semiotic Immanence; 4 Diagrams of Variation: Functor Categories and Presheaves; 5 Deleuze and Expressive Immanence; 6 Diagrams of Difference: Adjunctions and Topoi; Conclusion; Bibliography.