To BR or Not to BR...

I have a short list in my head of what MCAT books I want to acquire by scouring various premed forums and Amazon. While most of these books are readily available, The Berkeley Review (TBR) books are only available through some less conventional channels. While I don't plan on purchasing the complete set, I will likely grab a book or two from the various subjects (e.g., Physics). The two primary methods for purchasing these books is through the TBR website or on the Student Doctor Network (SDN) forums. Keeping this in mind, if you plan on using TBR resources, I'd plan ahead because it isn't as simple as running to your local bookstore.