The Book of Baruch - Discussion of Baruch and the apocryphal texts about him from a general Christian perspective. - http://biblia.com/bible/baruch.htm
Apocalypse of Baruch - Greek apocrypha in which the disciple of Jeremiah gives an account of the revelation he received in Heaven. - http://www.jewishencyclopedia.com/view.jsp?artid=329&letter=B
Catholic Encyclopedia: Baruch - Commentary on the scribe of Jeremiah from the traditional Catholic perspective. - http://www.newadvent.org/cathen/02319c.htm
Jewish Encyclopedia: Baruch - Overview of the disciple of Jeremiah from the traditional Jewish perspective, including rabbinic commentary. - http://www.jewishencyclopedia.com/view.jsp?artid=328&letter=B