If you think PPL air bore was sleeping material wait until you get to ATPL.
Most of the PPL air law is a test of what you should be doing during your PPL training anyway. What is your school/instructor doing to help you here?
You are unlikely to pass any exam by just reading books however many times you read it, you must WRITE IT DOWN. The human mind takes in far more information by writing things down and preferably actually doing things.
You obviously don't need to write everything, create yourself some Key Fact Q cards divided into different topics with the minimum information needed. Revise from these Key Facts.
You should also be aiming for a 100% pass this shall then allow you an error buffer zone for a bad day or some odd ball questions. Aiming for just 75% is likely to see you failing again.