The use of relatively brief direct quotations from a published work normally does not need permission from the copyright owners since it comes within the "fair use" rule. In reality, the work is immediately copyrighted the moment it is completed....
However, if the quotation taken as a whole amounts to an original work, i.e., if it has independent value as a self-contained expression, it too will be protected by copyright.
For example, if I write an article on Shakespeare for my school paper, I would need permission from Shakespeare's descendants to include certain quotations since they are considered an essential part of his work. However, I could easily copy excerpts from his plays and include them in my own article without needing permission since they are in the public domain. Similarly, if I were to write a book on the same subject, I could also quote extensively from Shakespeare's works without needing permission since they are in the public domain.
It is important to note that although it is possible to quote extensively from another writer's work and still call your project an "unauthorized biography," this does not necessarily mean that you have done something illegal. For example, if you were to write an unauthorized biography of George Washington using materials found in the public domain (i.e., books written by other people), that would be legal since he is in the public domain.
According to US copyright law, the legal rights to a quotation automatically belong to the author (or speaker). Quotes are considered intellectual property and are legally protected. You have formal permission from the author to use their words in your work. However, you must always give credit to the author for their work.
Does this mean that if I quote someone, I have to get permission from everyone? No. If you are using a small portion of text, then it is safe to use without asking permission. But if you are going to use a large section of text, we recommend contacting the author first. They may even allow you to use their words without asking permission!
Here are some ways that authors can contact speakers:
On Facebook: Author pages are made up of "groups" where you can post messages to many people at once. Each person who clicks the "like" button on the page will be added as a member of the group. So if you want to send message to the whole group, you can just post it there. The advantage is that people who like the page will see the posts, and people who don't like the page won't see them.
Email: Authors can also email other authors or speakers directly to ask permission. This is the best way to reach a large number of people at once.
Allowable Use According to the fair use concept of U.S. copyright laws, you can use limited portions of a work, including quotes, without permission for specific purposes, such as book reviews, classroom lectures, academic studies, and news reporting. In general, unless there is a financial gain involved, others have no reason to complain if you share your knowledge with others. For example, if I write a book on cooking for a small group of people at my home, I could probably quote large portions of the book in other articles or presentations without risking a lawsuit from the author or publisher.
In fact, books that are shared with friends or family often include endorsements from those individuals. For example, a friend who has been through what you are going through might send readers to areas of interest or value in the book. If this person refers to something they enjoyed or found helpful, other people may want to read about it too. Endorsements like this are commonly included in books that are distributed freely.
The only time I could see someone having a problem with you sharing information is if the person had money invested in the book or was otherwise financially affected by its sale. For example, if I wrote a book on how to be successful in business, I wouldn't share any content from that book with anyone who didn't pay for it. Doing so would be a violation of their copyright.