- $4.99Non-Euclidean GeometryAmazon
- $23.99Non-Euclidean Geometry by H. S. M. CoxeterBetter World Books
- $10.99and upNon-Euclidean Geometry for Babies (Math for Babies)Amazon & 1 more
- $86.91A Simple Non-Euclidean Geometry and Its Physical Basis: An Elementary Account of Galilean Geometry and the Galilean Principle of Relativity (Heidelberg Science Library)Amazon