Yet another book in this science series about various topics--in this case, the study of trees or dendrology. The big question is answered through the digital illustrations and text, and scientists have discovered that trees do communicate with each other and with insects, sometimes sending out warnings of danger, working together, and even changing the taste of their leaves to prevent animals from eating them. Who knew? Some plants even make clicking sounds, something that scientists are still trying to figure out and what the sounds mean. This title answered that big question, of course, but it also leaves readers with even more questions.