Zzzap getting hungry is bad / talking to ghosts

And he was starving. He almost never got hunger pangs in the energy form. It didn’t bode well for when he became solid again.
“Yeah, I know,” he said to no one in particular. The wraith stopped in midair and glared off to the east. “Look, why don’t you do something useful and figure out where Danielle is?”

Excerpt From Ex-Patriots, pg 509
Peter Clines
https://books.apple.com/us/book/ex-patriots/id585738393