Section — Wouters, Manual of Moral Theology
§ VI. On Evil Writings
472.
I. Books and newspapers professedly or notably contrary to religion or good morals are commonly a proximate occasion. Of this kind are, for example, socialist newspapers and many novels. Books and newspapers which do not oppose religion or good morals so notably are a relative occasion. To this are referred several liberal newspapers and many novels, as being erotic.
II. In doubt whether a book is dangerous, to read through it is illicit.