Ideally enjoyed these. Can't find them as ebooks. The first one was where I first encountered the idea of the "One Electron Universe": https://en.m.wikipedia.

Ideally enjoyed these. Can't find them as ebooks. The first one was where I first encountered the idea of the "One Electron Universe": https://en.m.wikipedia.org/wiki/One-electron_universe https://en.m.wikipedia.org/wiki/One-electron_universe A major plot point of these books is an alien technology that enables teleportation by somehow tapping into the Earth's angular momentum.