My name is Ryan and I am one of the online instructors. Thank you for your question, I am more than happy to help!
The course comes with the required content needed in order to successfully pass the course. The course itself does not include the the book "Personal Fitness Trainer: Theory and Practice" but rather excerpts from it. The book can be purchased separately. Although the book is an excellent resource to have, it is not necessary to take and pass this course.
Please feel free to email me at ryanafaa@gmail.com if you have any further questions and I would be glad to help!