“The book reads smoothly, emphasizes examples over theorems, and has pictures (mainly of concept lattices) and tables galore. … I thus recommend it to all researchers concerned with FCA or query learning.” (Marcel Wild, Mathematical Reviews, May, 2017)“The book is a very pleasant and interesting reading on attribute exploration from formal concept analysis. Reading it, I felt that all the theoretical background is thoroughly described and always accompanied with many explanations. It also abounds in very illustrative examples, whose solutions are given step by step. … This is a book written with a lot of enthusiasm all of which will be transferred to its readers.” (Catalin Stoean, zbMATH 1357.68004, 2017)