Can you mention someone in a book without their permission?

Yes you will need their permission. Even in Acknowledging someone in your book, their permission is required, Some people are just quite private, and do not wish to reveal their identities to the masses. I have 2 sisters, I have never written their names in my books, not even in Acknowledgements…

Can you quote someone in a book without their permission?

You DON’T need permission: To quote or reference the title or author of a work such as books, poems, movies, TV shows or songs. To quote books or other works published before 1923. For news stories or scientific studies. Shorter quotes, references and paraphrasing is usually ok without permission.

How much can you quote without permission?

Every publisher sets their own threshold of “fair use” versus requiring permissions. One publisher requires permission for using 25 words or more from any one source, aggregate over the entirety of your book. This means if you quote 16 words in one place and 10 words in another, you must get written permission.

Can you use famous quotes on t shirts?

Quotes can be trademarked if they’re recognisable and mention famous characters. Everyone has the copyright to anything they write down, but it won’t be protected if the sentence is short or generic. Also, most people won’t bother pursuing you for using it on a T-shirt as long as it is properly attributed.