ibooks store content
I am unable to locate the books as shown by apple in its website. There are only old books available to th store.
iMac, OS X Mavericks (10.9)
Apple has not been able to negotiate distribution rights with publishers in all countries. Look for your country here:
http://support.apple.com/kb/TS3599
and see what it says is available in your cuntry.
Regards.