Well, consider two things:
1.) The sheer amount of information contained in the book far, far exceeds what is recognized by the Church as being true, orthodox, or even known.
2.) After a quick “google”, the books primary readership and following are non-catholic sources and organizations, the majority of which are spiritualist or occultic in tenor.
While it may be a solid reference for the entire collection of “angelic knowledge” from many different sources and traditions, what I could find on the internet suggests that it steps well outside “Catholic” orthodoxy or accepted sources. One reveiwer recognized some of the angels as being of the gnostic Aeons, a clearly non-Catholic source of proposed Angels.
If you are looking for a Catholic source of angelic information, then perhaps contacting the Opus Angelorum (
here ) would get you a better idea as to what sources would be more useful to you, and maybe even give you a clearer or definitive catholic assessment of the book in question. They do publish some books on angels as well.
Hope it helps.