Genesis Library (LibGen) is a search engine for articles and books on various topics, allowing free access to paid content elsewhere. It also provides pdf content of Elsevier's ScienceDirect portal. The controversy revolves around the copyright status of many works, which can be accessed through this website. Some publishers, such as Elsevier, accuse Genesis Library of providing pirated access to articles and books; In turn, publishers are accused of profiting unethically from the works, research papers and textbooks written by professors on the public salary list.