What if the universe were folded in a new dimension? What might you discover?
Hard science fiction, romance, intrigue, dimensional portals.

The Russian and Chinese assaults were defeated through the use of portals supplied by Folded Universe. However, there were still spies, seduction, and a war being planned.
Folded Universe is now a profitable company. Bob and Suzie Hunter and Pat and Rita Kelly are running safaris on Jura and have helped found a colony on Jura. The Russians have also founded a colony where they had previously had a military base. Rita and Pat are running a large University of Tennessee project that is funded by the National Science Foundation to investigate Jura. And the math and physics departments are researching various aspects of the 4-dimensional space that contains the folded universe; Bob and Suzie are leading these efforts.
But Jura was just one of the near-Earth planets, so Bob and Suzie picked another planet to investigate. This one contained an abandoned city that was being engulfed by a jungle of vegetation. Accordingly, they named this planet Yucatan.