I've decided to purchase the .pdfs off Cambridge for 46-51, meaning I won't have to wait for a book to arrive, plus I like writing them like this as opposed to the bulky booklets Amazon has.
@Mookittyy, the first session will be PT 46 on May 1st. Nicole posted a link to a google calendar. I think I tagged you in it, but the thread is "br group calendar now available" if you missed it. They're also doing the 70s over the next few weeks.