Attorney and author Helen Sedwick shares in her article on Getting Creative with Disclaimers, which I read in The Book Designer, that your disclaimer does not have to be boring and if you taken liberties with historical facts and figures, be open about it and make the disclaimer part of the book's experience for readers. Ms. Sedwick's examples for disclaimers are entertaining and worth reading.
Here are some examples from the article by Ms. Sedwick:
Disclaimers for Fiction
This is a work of fiction. Names, characters, business, events and incidents are the products of the author’s imagination. Any resemblance to actual persons, living or dead, or actual events is purely coincidental.
This novel’s story and characters are fictitious. Certain long-standing institutions, agencies, and public offices are mentioned, but the characters involved are wholly imaginary.
This is a work of fiction. Although its form is that of an autobiography, it is not one. Space and time have been rearranged to suit the convenience of the book, and with the exception of public figures, any resemblance to persons living or dead is coincidental. The opinions expressed are those of the characters and should not be confused with the author’s.
The role played by Freud in this narrative is entirely fictional. My imagined Freud does, however, abide by the generally known facts of the real Freud’s life, and I have sometimes quoted from his works and letters, passim. The letters . . . and all the passages relating to psychoanalysis . . . have no factual basis.
Disclaimers for memoir:
I have been corrected on some points, mostly of chronology. Also my mother claims that a dog I describe as ugly was actually quite handsome. I’ve allowed some of these points to stand, because this is a book of memory, and memory has its own story to tell. But I have done my best to make it tell a truthful story.Please read more about disclaimers, nonfiction ones, and the legal effect of disclaimers in
the whole article by Helen Sedwick at: http://www.thebookdesigner.com/2016/03/getting-creative-with-disclaimers/