Hopefully, going through this book was a positive learning experience for you. If you are interested in learning even more about Bootstrap 4, make sure that you check out the Packt website, using the search term of Bootstrap 4, or simply go to the following link: https://www.packtpub.com/all?search=bootstrap%204.
Also, you can never go wrong with going back to basics and reading the official Bootstrap documentation, currently available at https://v4-alpha.getbootstrap.com/getting-started/introduction/.
