girl and her precocious younger brother (creepily so, to the degree of being a miniature grown up) travel to another dimension to confront an evil darkness and a pulsating giant brain, and rescue her physicist Father 
 some witch/angels assist as do a set of spurious aliens 
 love conquers all, and quickly back home 
 for a story with tesseracts and higher dimensions was so disappointed with the single dimensionality of all the characters 
 story seemed haphazard to me, built around a thinly veiled religious core 
 veered from lightly brushing on scientific principles to contradicting them in the space of a few paragraphs 
 just not for me