Is the Book of Enoch in the Catholic Bible?
No it is not.
Nevertheless, the better question is: why was Enoch disqualified? Some non-canonical books ("Apocrypha") are completely trustworthy, but the Catholic Church never ruled that they were "inspired by the Holy Ghost AND were always part of Scripture".
Let's just say "not chosen for the Canon of Scripture" doesn't mean "burn it with fire!". Think of all the non-Canonical books written by man (not the Holy Ghost) are praiseworthy to read: The Imitation of Christ, Intro to the Devout Life, the Summa Theologica, etc.
There is a huge variety among the Apocrypha: Some of the books are erroneous and filled with heresies. Others just didn't quite make the cut. Maybe they appeared too late, and the Church erred on the side of caution. Or maybe there was an issue with translations, and the Church couldn't de-tangle the mess. There are 99 reasons why a given book could have been excluded from the Canon. Heretical content is only one of them.