Sparks of reason. Vernacular rationalism in the Low Countries, 1550–1670. By Ruben Buys. Pp. 304 incl. 16 colour and black-and-white ills. Hilversum: Verloeren, 2015. €35 (paper). 978 90 8704 515 9Dirck Volckertsz Coornhert, Ethics or the art of living well. By means of knowledge of the truth about man, sin and virtue. Described for the first time in Dutch. Edited and translated by Gerrit Voogt. Pp. 506 incl. frontispiece and 9 black-and-white and colour ills. Hilversum: Verloren, 2015. €49 (paper). 978 90 8704 516 6