A list of Church books available at the Evangelische Landeskirche in Baden can be downloaded at this link: Karlsruhe. Note: some Mennonite and Jewish communities are included. Link to church book inventory: Church book inventory for Karlsruhe
Die Kirchenbüchern in Baden by Dr. Hermann Frarnz: Online at wiki.genealogy.net.
Alter und Bestand deer Kirchenbücher, insbesondere im Grossherzogtum Baden. Online at FamilySearch.org