Yes, I think the Burnin' Up book is worth having your dad bring back.
And yes, they've said they're having a world tour this year. Not sure if they're going to Australia, but most likely. =)
i also go it for christmas, my mom thinks im OBSESSED but shes an idiot so whatta ya gonna do?! haha but i thought it was cool and my best friend loves them and she said they were going to austrailia because she saw an interview about their world tour and they said they have such a huge fan base there that they wanna do some shows there.