IBO, anyone?

I recieved a catalog from Oxford University Press today and started thumbing through it. It occured to me that since they had an online address I should compair the versions. If they were really close, I was going to send the e-version to staff versus trying to route the catalog. Well, they are not close at all. But that's not the interesting part to me. While looking at the e-version, I came accross a series of books known as companion to the IB program. What's that?

IB Theory of Knowledge Course Companion
International Baccalaureate Diploma Programme
Eileen Dombrowski, Lena Rotenberg, Mimi Bick
$42.00
In Stock, Paperback, Jul 2007 ISBN13: 9780199151226ISBN10: 0199151229 The ideal companion to IB Theory of Knowledge, developed in collaboration with the IBO
See more from the series
International Baccalaureate Course Companions

What? When did this come up and who is it for? I clicked on the link and discovered a whole list of companion subject titles.

At first glance, this seems to be Australian based, but it is:

"a challenging two-year curriculum, primarily aimed at students aged 16 to 19. It leads to a qualification that is widely recognized by the world’s leading universities".

Upon a closer look I found the link to IB Americas and found that it is also available in the States.
I wonder if any of our local charter schools are doing something similar. In the global market, it pays to stay well rounded.