This study attempts to achieve a picture of the ownership and use of books in Groningen, up to the Reductie, the expulsion of Spanish forces and the establishment of the Protestant religion, in 1594. The books belonging to and associated with the city’s main church, St Martin’s, the principal collection in city and province, have been chosen as the centre-point of the research. But as this choice meant the risk of excluding certain books that might make an essential contribution to our understanding, material has been drawn in from a series of varying circles round the core collection. ... Zie: Summar