black's books have typically made use of networks of volunteer and professional researchers assembled for each project. three years before completion of his 2001 book, "ibm and the holocaust," black began to put together what would ultimately become a team of more than 100 researchers, translators, and assistants to work on discovery and analysis of primary source documents written in german, french, and polish. in all, more than 20,000 documents from some 50 different libraries, archives, museums, and other collections were assembled and analyzed in the writing of the book.