«This monograph opens up a new and hitherto completely unexplored type of primary source material for the study of the Crusades: crusading liturgical texts»
«Amon Linder has written a remarkable book, one of those rare volumes that appear every few decades and effectively open up a completely new field of research» (N. Housley in Speculum, 80 (2005), p. 625).
"Overall this is that rare thing - the revelation of a new body of source material. But Linder has not stopped at mere revelation: his exploration and analysis are remarkable. This is a truly important book which will be of value to generations of historians, and not merely historians of the crusades." (J. France, in: The Medieval Review, 04.02.44)
"die intensiv aus der Arbeit mit den zahlreichen Quellen schöpfende Studie, ergänzt um ein Registere der Handschriften, Incipits, Namen und Sachen, macht mit einer bisher wenig beachteten und in vielerlei Hinsicht unrühmlichen Praxis der mittelalterlichen Liturgie bekannt." (Jürgen Bärsch, in: Archiv für Liturgiewissenschaft, Jahrgang 52. 2010, Heft 1/2, p. 248-249)