Katholisches Schriftprinzip? Josef Rupert Geiselmanns These der materialen Schriftsuffienz [A Catholic Scripture Principle? Josef Rupert Geiselmann's Thesis on the Material Sufficiency of Scripture], Daniel Eichhorn, Aschendorff, 2016 (ISBN 978-3-402-11999-0), iv + 289 pp., hb €45 - Harris, Steven Edward (Reviews in religion and theology, 2017)