The Mouton World Atlas of Variation in English (WAVE), edited by Bernd Kortmann and Kerstin Lunkenheimer, is an impressive and significant achievement. Consisting of almost 1,000 pages of detailed accounts of morphosyntactic patterns in 55 varieties of English from around the world (with some analysis of a further 19) by an international range of experts (many of whom are native speakers of the varieties they describe), WAVE represents a major step forward in our understanding of dialect variation in English and illustrates in fine detail a vast array of linguistic systems that fall under the umbrella ‘English’ across the world today. Using a list of 235 morphosyntactic features, WAVE explores diatopic variation in L1, L2 and pidgin/creole varieties across the globe, illustrating the results in 96 full-colour maps, and investigates the deeper relationships between the varieties in 23 colour-coded phenetic networks. It is a veritable feast for the eyes, but there is so much detail in it that it is much more than that; it is, in fact, a huge database echoing in many ways The World Atlas of Language Structures (Haspelmath et al. 2005) in its depth and breadth.