It's in a few dictionaries here (click on the underlined link and bookmark the site for future reference).
I want to describe a guy who is handsome, but kind of having an academic look, rather than sporty. Is it appropriate/grammatically correct to use "bookishly handsome" to describe such a person? But "bookishly" seems to be a typo, and it is not in the dictionary.
The phrase "bookishly handsome" is not common but it has been used. See the results of a Google search here:
From prevoius post (link at the bottom), I understand that "bookishly handsome" is not a common use. So in the following sentence, any synonyms your recommend to supersede "bookishly handsome"?
"Sitting in the passenger seat of the red Toyota Corolla, the 45-year-old, bookishly handsome investment manager momentarily gapes at the video camera that the driver of the car is pointing at his face."