Joomla 4 templates - Book / Livre

Using this book, is it possible to make a template for joomla 5 from a ready-made html and bootstrap 5 template?

no, you will be able to make a joomla template from scratch. Nothing related to Bootstrap or other frameworks

Are there any plans to update this book in the near future?

update for what ? may be just the front cover and write joomla 5