With somewhere between 100 and 200 billion communicating cells, the human brain is nothing short of incredible. Sometimes, its workings can be mysterious, complicated, and ultimately difficult to comprehend. A Friendly Guide to the Adolescent Brain is written by two high schoolers who want to make learning about the brain more accessible and relevant to teenagers than the average textbook or science website. From video games to the food you eat while playing them, it talks about everything having to do with the brain that is most important to you, as an adolescent.