Natural language processing is one of the most rapidly evolving areas of artificial intelligence, and is the subject of this excellent book. One of the important contributions of this valuable resource is its presentation and comparison of many current state-of-the-art machine translation systems available to the general public. Summing Up: Recommended. Advanced undergraduates through faculty and professionals. (J. Brzezinski, Choice, Vol. 56 (6), February, 2019)