What does fictionalize mean?

What details does the author fictionalize?

Fictionalize: to create a fictional version of.

i don't have the passage but any details that are made fake or exaggerated, imaginary etc and made up are fictionalized

fictionalization means "give or create a fictional version of"

an author might use this when creating a story. to fictionalize you need sources, any-type. It's better to use reliable. so, in your story (I'm assuming) what did the author use with sources ...