Pandora's Star (Commonwealth Saga #1)

by Peter F. Hamilton

In deep winter, of course, the pattern would be reversed, and the sun would only be visible for about six hours a day. Even then the climate would cool down to something like Earth’s Mediterranean temperatures. Anacona’s proximity to its primary star made the planet uninhabitable from the equator out to fifty degrees latitude north and south, most of which was a rocky desert.

Worldbuilding- Hot planet where people mostly live in the polar regions

“We’re somewhere else, aren’t we?” Orion asked eagerly. He was looking around with an entranced expression at the thick fronds crowning all the trees.

How changing to fae plane should work in d&d