“The well-written and thorough monograph by Exner and Kovařík contains an excellent treatment of developments in the flourishing subject of quantum waveguides. … The monograph is also highly recommended for those with a wider interest in quantum mechanics, since seeing how the concepts and mathematical methods of quantum mechanics need to be adapted to the case of waveguides is an engaging and instructive way to deepen one’s understanding of them.” (Evans M. Harrell II, Bulletin of the American Mathematical Society, Vol. 55 (2), April, 2018)