War and violence in the western sources for the First Crusade. By Sini Kangas. (History of Warfare, 143.) Pp. xii + 424 incl. 20 colour figs. Leiden–Boston: Brill, 2024. €145. 978 90 04 69033 22; 1385 7827 - Rubenstein, Jay (The journal of ecclesiastical history, 2026)