Ruth,
If you'd like to get some reading done my advice would be to download the
AIP Book from the ASA website (it's free), and become familiar with pretty much all of the GEN and ENR sections. People have said on here that studying this information will only help you during the first 2 months (theory phase) of your training and not to bother. Well, while it is true that a LOT of the theory is derived straight from that book, I disagree with those posters. A lot of the information in that book will be relevant to you for the length of your career.
Then again, I've only been around 18+ years so I'm not sure I qualify as having a
long career. Yet!