When my first son was two, I tossed him a ball while he was standing on top of the playground. He took a few steps backward and fell down. If I had thought ahead about the possibility, I could have prevented the accident. When my second son was three, he pulled out the drawers and climbed up. The dressers tipped over and the heated humidifier fell down. He lost control and sat on it. His butt burned. If I had turned off the humidifier, I could have prevented the accident. Then again, I did not read Casner’s Careful, an informative guide explaining the psychology of safety. The stories and statistics on accidents presented in this book are terrifying. Fortunately, we can prevent them by thinking ahead. After reading this book, you’ll think twice about driving and texting, leaving your kids at the pool by themselves even for a split second, carrying your knife around, letting your children sleep on bunk beds, speeding in traffic, and engaging in countless absent-minded haphazards that could lead to serious injuries.