The word Pseudepigrapha means “false authorship.” It may be better to understand these as books, which were written using well-known ancient figures’ names as the authors. Today, one might call it a “pen name” or pseudonym used by a writer. These books are called Apocrypha by the Roman Catholic Church, while the Eastern Orthodox accepts Third and Fourth Maccabees as canonical. (Griffin. God’s EPIC Adventure. 219).
The book of 1 Enoch and The Book of Jubliees are a part of this collection of books know as the Old Testament Pseudepigrapha.