Kinnell picked this out at the library and we sailed through it in one night. He was super into it. It was fun-- kids find a strange new world, solve some problems, make it back home before anyone notices. No fuss, no muss. I guess if you want to get picky the world-building is a little random--why does the spider have a human head, why does the bad guy's car have an old-timey oooga-oooga horn? But hey! Whatever! Let's just have some fun and Droon it up.