卷帙浩繁

juànzhìhàofán
a huge amount (of books and papers)

CEDICT

卷帙，書籍。卷帙浩繁形容書籍非常繁多。

重編國語辭典

形容書籍繁多，或者一部書籍的篇幅很長

維基詞典

Entry Composition

1 卷帙 juànzhì book
2 浩繁 hàofán
  1. vast
  2. voluminous
  3. many and varied
  4. numerous
  5. extensive amount of
  6. exhaustive
  7. heavy (expenditure)
  8. arduous
  9. strenuous
  10. exhausting
  11. draining
  12. burdensome