Adding several "Read More" to a post

I would like to create a post with several “Read More” buttons within the same post. For example, I would like to add several book synopsis to a post but those can be quite long which would make the post long. I would like to cut off the book synopsis with a “read more” tag that would expand the book synopsis. I would like to do this for several books in one post.

I have installed the plugin “Read More Right Now” and have figured out how to keep the “read more” function on the same page, but how do I not have the other books hidden below? How do you make it recognize what you want to be included in the “read more” and what you don’t want included?

As if you couldn’t tell, I’m very new to this.

Thanks for your help!