Several takes on projective geometry
Within a vector space
As Lattice
A riff on Desargues’ Theorem
Extending the map of a square, to a map of the plane
Cartesian form of 2D Projection

Computational projective geometry
2D projection of higher order curve is also curve of same degree.

D. N. Lehmer’s book I knew Lehmer personally. I did not know of this book!