The Essential Book For Young Lads is a book that appeared in Diary of a Wimpy Kid: Old School Grandpa gave Greg this book while packing up items for his trip to Hardscrabble Farms. Greg said that the book was outdated, but he did not want to hurt his Grandpa's feelings, so he decided to take the book with him during the camp. When Greg found out that the other group had raided his cabin to find Graham's snacks, used his baby wipes to clean up and tried to flush it in the toilet, causing it to clog, he flipped through the pages and realized that the guys who had raided his cabin might have done them a huge favor. Greg found there was a whole lot of information he considered useless, like how to make a Potato Radio out of household objects, and a lot of good information on surviving wilderne