Insects that are the least bit social may gather in modest groups, like the dozen or so sawfly larvae feeding on a pine needle, or they may form huge masses, like a swarm of migratory locusts in Africa or a cloud of mayflies at the edge of a midwestern lake or river. Why these insects get together and what they get out of their associations are questions finely and fully considered in this learned and entertaining look at the group behavior and social lives of a wide array of bugs.

The groups that Gilbert Waldbauer discusses here are not as complex or tightly organized as the better-known societies of termites, wasps, ants, and bees. Some, like the mayflies, come together merely because they emerge from the water in the same place at the same time. But others, like swarms of locusts, are loosely organized, the individual insects congregating to migrate together for distances of hundreds of miles. And yet others form a simple cooperative society, such as the colony of tent caterpillars that weaves a silken tent to house the whole group.

Waldbauer tells us how individuals in these and other insect aggregations communicate (or don't), how they coordinate their efforts, how some congregate the better to mate, how some groups improve the temperature and humidity of their microenvironment, and how others safeguard themselves (or the future of their kind) by amassing in such vast numbers as to confound predators.

As engaging and authoritative as Waldbauer's previous books, Millions of Monarchs, Bunches of Beetles will enlighten and delight those who know their insects well and those who wish to know them better.

Jack the Ripper. Jeffrey Dahmer. John Wayne Gacy. Locusta of Gaul. If that last name doesn’t seem to fit with the others, it’s likely because our modern society largely believes that serial killers are a recent phenomenon. Not so, argues Debbie Felton—in fact, there’s ample evidence to show that serial killers stalked the ancient world just as they do the modern one.

Felton brings this evidence to light in Monsters and Monarchs, and in doing so, forces us to rethink the assumption that serial killers arise from problems unique to modern society. Exploring a trove of stories from classical antiquity, she uncovers mythological monsters and human criminals that fit many serial killer profiles: the highway killers confronted by the Greek hero Theseus, such as Procrustes, who tortured and mutilated their victims; the Sphinx, or “strangler,” from the story of Oedipus; child-killing demons and witches, which could explain abnormal infant deaths; and historical figures such as Locusta of Gaul, the most notorious poisoner in the early Roman Empire. Redefining our understanding of serial killers and their origins, Monsters and Monarchs changes how we view both ancient Greek and Roman society and the modern-day killers whose stories still captivate the public today.