The fascinating story of migration is told in this excellent sequel to Strange Partners. In his depiction of the suicidal march of the lemming, the parade of the soldier ant, the rise of the worm Paolo, the North Pacific journey of the seal, the descent of the locust--the author imparts a hoard of natural facts in a style which is as lucid as it is intriguing. A book which is indispensable for school libraries, and one which also will be read and reread with enjoyment at home.