“This book is about online algorithms for optimization problems. … The book can be used as a textbook on the undergraduate level. … The book can also be used for self-study and as a reference. Its strength in this regard is enhanced by the historical notes at the end of each chapter and a comprehensive bibliography.” (Bogdan S. Chlebus,Mathematical Reviews, March, 2018)“This text is an important contribution to the field of online algorithms. … Without a doubt, this text is a must-read for anyone seriously pursuing the analysis of algorithms, particularly online versions of those algorithms.” (Michael Goldberg and R. Goldberg, Computing Reviews, October, 2017)