As for the fourth one, I have to agree partially with Spellbinder, because (though part of me hates to say it) I think James Patterson could have done much better with it. But, I think you should still read it. I mean, yes, he did go a little overboard with the whole global-warming thing (Most of which, I don't personally agree with) But, it's still worth it. If you loved the series, you have to read this last one.
Come on, Max is still as sarcastic as ever.
You've got nothing to lose.
I loved these books so much (thus the icon and profile pic) and you will too.