As a past Cadre (at another academy), we were fine with people having them ahead...although we didn't know. For some, it reduces some of the stress. Not a huge deal, because we found ways to put pressure on them. What you want to avoid, whether buying the book or not, is coming off like a know-it-all. If you know your stuff great, and studying can get you ahead in that department. I would suggest however, don't freely give that information, however be able to provide it when it is asked for. Cadre have no doubt that they are working with people who may have been through AIM or NASS or any other program. They know the materials are out there. A swab knowing to much is far from their mind, however a swab showing his or her classmates up, will stand out...in a bad way.