The book is written by B.Ganter and S.Obiedkov. Bernhard Ganter is emeritus professor of mathematics at Technische Universität Dresden, Germany. His main research field is Formal Concept Analysis. Sergei Obiedkov is an Research Fellow at the ISSA Laboratory and an associate professor at the National Research University Higher School of Economics, Moscow. His research covers topics in data analysis and artificial intelligence, including logical and algorithmic aspects.