This monograph synthesizes an avalanche of new data about ant biology. The most recent update in its field in the past 15 years. The quality of its content and presentation make it a valuable scientific resource. It is both a treatise for specialists - who will notably appreciate its 2,300-reference bibliography, including numerous articles published in the last few years - and an extensive outreach work for the lay audience. Written in plain language by two world-class specialists, this reference book reads effortlessly. Magnificent photos and drawings make the reading experience even more enjoyable. It is essential reading for all those interested in ants and, to a larger extent, in the biology of animal societies. Laurent Keller