For those interested in optimization based on ant colony behaviour, the book "Ant Colony Optimization" by Dorigo and Stutzle is the text to get. It's quite old

For those interested in optimization based on ant colony behaviour, the book "Ant Colony Optimization" by Dorigo and Stutzle is the text to get. It's quite old now (2004) and unfortunately hasn't seen a second edition. It's a bit of a forgotten classic, in my opinion. I don't work professionally in this area but I found it to be highly approachable. The various ACO algorithms are appealing not only for their utility but also for their intuitiveness. I mean, it's easy to visualise ants cruising around, leaving pheromone trails, and so forth.