If you're working on a project that requires lots of time or effort (like writing a book), it helps if you have the motivation to keep going when things get difficult and boring. That's where emotions like excitement and determination come in!
The same can happen if you read a good book. Especially a good fantasy book. And this do not even requires a lot of time, nor effort. Nowadays I read mostly fantasy books. They are very detailed and I love them. A good fantasy book can make you feel a lot of emotions. For example see Jess E. Owen's books. Her books are amongst my all-time favorite fantasy books.
Thank you for the recommendation. I will check it out.