book-learned
/ˈbʊkˌləːnɪd/ /ˈbʊkˌləːnd/ /ˈbʊkˌləːnt/adjective
Having knowledge acquired (only) from books; knowledgeable about books. Now frequently somewhat depreciative.
Origin
Late 15th century; earliest use found in Awntyrs of Arthure. From book + learned.