Grownup Books

I have been reading YA exclusively for a while. Not by any plan, but that is just what happened. Saturday I started a Sci-Fi book. After reading the first paragraph I realized my brain had become atrophied. I understood none of it. "The pseudofabric structure of the wormholes was a photonic dead zone." Am I supposed to know what that means? Do regular people understand that? Will I figure it out by the end of the book? Is it even important? Do I care? I want to care because my coworker is waiting anxiously for me to tell her how much I love the book. But it is work for my lazy brain. "Captain Kyle Prager was shocked out of a simple astrogration review by a datavised proximity alert from the flight computer." Sigh...Only 580 pages to go.