This is the 2211th most frequent Korean word.
중에서도
"Among others" or "especially among."
그 책들 중에서도: here, 중에서도 highlights a particular novel as being preferred within the group of books.
그 책들 중에서도 특히 이 소설을 추천합니다.
Among those books, I especially recommend this novel.
학생들 중에서도: here, 중에서도 emphasizes selection from within the group of students, highlighting comparison.
학생들 중에서도 어쩌면 그가 가장 공부를 잘하는 것 같아요.
Among the students, it seems he might be the best at studying.
봄 중에서도: in this sentence, 중에서도 is used to specify April as particularly noteworthy among the months of spring.