The Ware Tetralogy

"Rudy Rucker is one of the modern heroes of science fiction, one of the original cyberpunks. The early cyberpunks only had a few writers who could be meaningfully called punks — writers like John Shirley and Richard Kadrey — but there was only one who could truly be called cyber: Rudy Rucker. Rucker is a mad professor, a mathematician and computer scientist with a serious, scholarly interest in the limits of computation and the physics and mathematics of higher-dimension geometry. But that’s just about the only thing you can describe as 'serious' when it comes to Rucker. He’s a gonzo wildman, someone for whom 'trippy' barely scratches the surface. His work is shot through with weird sex, weird drugs, weird brain chemistry, and above all, weird science." — Cory Doctorow