The Klasema Art gallery in the Netherlands has an outstanding collection of (mostly post-war, European) abstract art. Many of the represented artists work in a geometric style. There are more than 150 images, with biographical information of the artists. There's also a nice collection of essays.
I'm always on the lookout for things to listen to while I walk the dog. This is something I'll be tapping into for sure.
I'm a self-taught artist based in Louisville, Kentucky.