Upon the topic of reading material. Letters, letters, letters. Tell your family and friends to write you during boot camp. I believe you can have a Bible for religious purposes but other than that letters are your "go-to". I wrote my boyfriend at least once a day while he was in boot camp (that totaled to over 50 letters!). He had something to read whenever he had time to. Also, I'm sure that you will want to spend your time studying or tidying up during available time (such as Divine Hours); or write letters back to your family. Good luck in boot camp!
On another note: no packages and don't have them use envelopes that draw attention (such as different colors or stickers on them). Plain white envelopes are a safe call. And no scents either (like perfume). Plain and simple