See this online ebook:

  • Creation, by Peter Kreeft (New Haven, CT: Knights of Columbus Supreme Council—Catholic Information Service, 2001). With Imprimatur. Part of the Luke E. Hart Series on Basic Elements of the Christian Faith (edited by Father John A. Farren, O.P.) The audio and the ebook in pdf format may be accessed through the CIS Booklets page of the Knights of Columbus.

Posted for the occasion of Earth Day, 2020. For links to texts specifically relating to ecological issues, see the index of links in the post “Online text: ‘Peace with God the Creator, Peace with All of Creation’, by Pope John Paul II“. For other texts and ebooks, you may access the List of Free eBooks (Arranged by Title), the List of Free eBooks (Grouped by Subject), the List of Worth-It Catholic Books & eBooks, and the main page of the Catholic eBooks Project.

Credo in unum Deum, Patrem omnipotentem, factorem coeli et terrae, visibilium omnium et invisibilium.