Attached are a list of suitable revision guides for the AQA (9-1) Science courses. It is only a list of the ISBN numbers for the guides as you may be able to get cheap version online.
You do not need to purchase all of the books just those that are relevant to your course.
The Oxford University Press books are endorsed by the exam board.
Triple Science students should look to purchase the individual science guides. Double science students need the books that are titled "Trilogy"