But it is also possible that the author simply invented one.
I at first believed that you had simply invented the story.
Since some of the sales agents were paid a commission for every new account, they simply invented them.
I knew how to trample my way through most any situation, but you can't simply invent a person's medical history.
Sometimes I think history was invented simply to record war, and before records, there were oral traditions.
Instead, medical tests were rigged - and at times, patients simply invented.
If it's the first type of series, you simply invent a new problem for your permanent protagonist.
The siglas were not simply invented, but passed on through generations.
When he couldn't find any- thing to be twisted, he simply invented things.
And there's always the option of reshaping or simply inventing words.