challenging, near-intimidating "Big" SF concepts on display--what is Reality, as opposed to how our senses (possibly narrowly) perceive Reality. can we break through to...beyond our senses? but the headbending stuff is being filtered through an accessible narrative, focused through an engaging Everyman (well, okay, an Everyman who used to be an astrophysicist, but is now more of a twit...). at this point I just want to meet Peta--the mystery-woman oft hinted-at...except I think she's the AI who is going to fold, spindle and mutilate Reality! maybe I shouldn't meet her.