Yes, PPFA sells all the publications recommended in the CPF Study Guide. I bought them to start my "framing library" and still refer to them (or their current counterparts) regularly.
The PPFA membership deal might actually give a payback, as the discount on books & exam fees could exceed the currently-reduced membership cost.
Not only rookie framers, but even the crusty old veteran framers who attempt the CPF exam without studying the recommended books usually fail, because no amount of typical shop work would expose anyone to the preservation knowledge needed to pass. Those who have the fortitude to study hard and try again usually succeed on their second try.
The CPF requires a year of framing experience because it is a qualification for framers. It would be possible for someone who has never built a frame to pass the exam, if they study carefully, and a few framing industry sales representatives proved it some time ago.
The all-written CPF could be viewed as the first step toward total PPFA certification; the second step being the nearly-all-hands-on MCPF exam. If you thought the CPF was a good educational investment, wait till you go for the MCPF.