For the MTA course you will not need to buy additional books.
For the Medical Coding Course you will need this years coding manuals. The ICD-9-CM volumes 1&2 (all one book), CPT 2013, and HCPCS 2013. Word has that AAPC has the best bundle price for these three coding manuals. If you are a member you get further savings. If you are not already a member, CCO will furnish you with a student enrollment letter that you can use to become an AAPC member at a discount.
When you enroll with CCO, you will get an email that details again what coding manuals you will need. There will also be word on when to expect the textbooks for the courses. Mine usually, arrived within 7 to 14 days. A wonderful thing CCO does, is they provide you with the first chapter in your student area as a download so that you can get started right away.
I would suggest starting with your MTA course first, that way you have time to set up your membership with the AAPC and get your coding manuals ordered. By the time they arrive, you'll have a little bit of medical terminology already under your belt.
I loved the MTA course myself. There are a lot of "bonus" activities and handouts included in the MTA. Take advantage of them.
I'm very excited for you. Below is a link for the Coding Manual Bundle you'll need for the coding courses.
http://www.aapc.com/medical-coding-books/2013/2013-physician-bundle-1.aspx
Is a membership with AAPC worth it right away? For me it has been. I've been able to attend meetings that are introducing me to coders already working in this area. It is a great place to network and know what jobs (and variety of coding jobs) exist in your area. You learn first hand what has worked for others in your area to get into coding. The topics are over my head a little bit but gradually I am catching onto the lingo. The members have been very helpful and want to see others succeed. They have been very positive about job prospects too. I know every AAPC chapter has its own personality, but for the most part, I think joining a local AAPC chapter is beneficial.
Also, AAPC has partnerships with all kinds of other businesses. I have been able to get discounts on purchases at Office Max and Sears and many many others.
Just thought I'd share that with you in case you're wondering if a membership would benefit you now or later.