DIMENSIONALITY
Arbitrary Character of Dimensionality--Various Definitions of Dimension--Real Space and Geometric Space Differentiated--The Finity of Space--Difference Between the Purely Formal and the Actual--Space as Dynamic Appearance--The A Priori and the A Posteriori as Defined by Paul Carus 92
The Mystery of Space · The Wunder Library — complete classics, free to read, with narration.