Darth Paper Strikes Back was awesome, much stronger than the first book, which was pretty rad itself.
Then I read The Grand Plan To Fix Everything, about a little Indian-American girl obsessed with Bollywood films and a certain Bollywood actress, who has to move with her folks to a tiny village in India. Many awesome Bollywood-style adventures ensued.
Now reading Jac0b W0nderbar and the C0smic Space Kap0w. The protagonist is really super unlikeable for me, a pretty horrible and unrepentant kid (destroying school property, destroying mom's property, lying about misdeeds, gluing stuff to a teacher's butt, causing his mom despair). I guess it's supposed to be his major flaw, but it comes off as douchey rather than sympathetic or lovable. But once the kids leave Earth their adventures are highly amusing, so I'm sticking with it.