I read through the book. I also used ham radio prep and ham study for testing. 

Take the test document what questions you missed on paper or in a spreadsheet. Study those missed questions then test again and document again. Then if you are struggling on a specific section you can reread that section in the book a few times. 

You only have to make a 74% which is 26 correct answers so if there is a section that is given you problems you might be able to skip those questions and still pass. 

https://hamstudy.org/
https://hamradioprep.com/