Arthur C. Clarke. 1953 book.

I noticed it when it was mentioned on r/HPMOR, on October 3rd 2012, by someone comparing HPMoR's Patronus 2.0 Crowning Moment of Awesome to a moment in this book.

Probably worth reading?

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.