I'm a sucker for the sort of book that takes an ostensibly mundane topic—here, sound—and tells an impressive take as you go down the rabbit hole. Bakker starts with obviously cools stuff like whale songs, but switches it up repeatedly so it doesn't get boring, and had some real surprises along the way. The idea that fish larvae navigate towards sounds of healthy coral reefs is pretty wild, as is the complexity of honey bee sound-based communication. I also liked to see how not very long ago a notion like bats using sound to navigate in the air was too incredible for scientists to believe, but now most grade-school kids know it as a basic bat fact. This was an impulse purchase and I'm glad I got it.