[1] In his day, he was the largest and most important publisher in the French language in the United Provinces.
[1] Rey never became fluent in Dutch, but entertained himself lavishly within the French-speaking social circle.
He published mainly in French, and most of his sales were in France, although his books were sold in Russia and in the Dutch overseas colonies.
[1] Rey had to deal with pressure from the French, Dutch and Genevan authorities and pastors, but continued to publish controversial books such as Rousseau's Emile and all the works of Baron d'Holbach.
[1] D'Holbach, a prolific atheist, said that Rey profited by his books both financially and from his pleasure in their subject.