I only recently realised there are more geometries than euclidean, spherical, hyperbolic and mix of them. But the wikipedia page on The eight Thurston geometries in 3 dimensions is cryptic to me. I'm looking for nice references that describe metric spaces with associated geodesics and properties for the geometry of the universal cover of $SL(2, R)$, the Nil geometry and the Solv geometry. With drawings !
For example, the book of J. Ratcliffe 'Foundations of hyperbolic manifolds' is a nice start for hyperbolic geometry, I'd like something similar for those exotic geometries.
The Shape of Space by Jeffrey Weeks.