Straighter Line Textbook Question

[kikikoder]

Can anyone shed any light on reading the textbook for Micro Bio and/or Nutrition?

The previous course I took had a Chapter listed to read under each Topic. These two do not mention it at all in the lessons. It's just listed as the title of the book on the syllabus. 

Am I expected to know the book cover to cover? I found the books on Open Stax but the chapters don't really match the title/order of the courses.

I don't really mind reading textbooks #nerd if I need to but don't want to waste my time if its not covered on tests or the final.

Thanks in advance