Great Reading for Fledgling Science Fiction Authors

This article was fascinating to me - the reality behind building a Halo - styled universe. A Halo is a sort of Ring World / Ring Satellite, which uses centrifugal force to create gravity, and spins rapidly. Ships wanting to land on the inner surface would, naturally, need to match this spin, but here's my favorite is catch - the atmosphere at the upper edges would be traveling at a different speed than lower atmosphere, and any ships attempting to land in it would be incinerated.