It is unusual for a collection of academic essays to flow as though written by a single author or pair of authors. The Blue Wave, edited by Larry Sabato and Kyle Kondik, does so. Any political scientist prepping courses on elections for next year, media pundits wanting to sound more knowledgeable, or political consultants seeking to give clients good advice must read this book. Its initial chapters provide an excellent, detailed retelling of the 2018 election. It moves on to “slice and dice” the role of different demographic constituencies in the outcome of the election. Lastly, the book does two things. First, it sets up how, if what was observed as widespread group behavior continues through 2020, the 2020 presidential election may be impacted. Second, it defines a wave election while simultaneously determining whether the 2018 election was a wave. Wave or not, the 2018 election was certainly significant, and Sabato and Kondik have assembled knowledgeable experts who write well and detail the election in a compelling way. Summing Up: Essential. Upper-division undergraduates through faculty.