Hi Elise,
Go to
www.thermomix.com.au (it is in Australia) and there's a section where you can shop online for books and bits and pieces for your TM.
I have no idea how much postage would be to Houston, you might want to check that before you get too carried away!
There are plenty of recipe book reviews in here, so have a read of them, might help you choose the right book.
Or ask questions, someone will answer them!