How to share information from a published work without plagiarizing?

There is a book that is published that I really, really like and would like to share with others on Youtube. My thought was to read passages from the book, not necessarily the entire book, over about 15–20 videos. I would state where the information came from, author’s name and site to buy the book. But I wanted to make sure that I wasn’t plagiarizing or anything like that. My sole purpose to get more exposure for the book which IMO is really great. How should I go about this or should I just abandon the thought.