Preparing a digital collection of any erudite 16th or 17th century book is a collective effort. That is why the project team of The School of Salamanca combines scholars with different background, from philosophy to computer science, from Digital History to legal history. Every early modern author has his ideosyncracies, no two books translate into the digital format alike. But the experience in converting the seven print volumes of Luis de Molina’s De Iustitia et Iure into a digital edition (still a work in progress) turned out to be much more challenging than expected. .