Take this with a pinch of salt, because though I'm immersed in geek culture enough to be passing familiar with superheroes, parallel universes, etc I don't have much contact with the primary sources, so maybe I just don't get it.

The plot moves along briskly but is complicated to the point of convolution and the writing style is often unclear. The main characters are cardboard cut outs and the supporting characters are tissue paper thin. The ideas were so interesting but they're mostly just wasted when they're not confused. Sometimes the pocket universe is the opposite of the origin, sometimes it's not. I don't know why. Does Christopher? (view spoiler)[Why are Sam and Lisa Saturn different? Why are Rad and Rex? Why aren't Carson and Nimrod? My questions need answering (hide spoiler)]

Okay, now I feel mean. Fine for a quick action packed read. 2.5 stars.