This volume deals with conversions to Judaism from the 16th to the 18th century. It provides six case studies by leading international scholars on phenomena as crypto-Judaism, "judaizing", reversion of Jewish-Christian converts and secret conversions of non-Jewish Christians for intellectual reasons. With contributions by Arthur Williamson, Richard H. Popkin, Elisheva Carlebach, Allison P. Coudert, Martin Mulsow and Martha Keith Schuchard.