Book excerpt: Andy and Terry add thirteen levels to their 91-story treehouse to live in a 104-story treehouse with all the amenities, such as a never-ending staircase, a burp bank, Mount Everest, and a money-making/honey-making machine. But when Andy gets a toothache that prevents him from writing their new book, Terry comes up with an idea to buy a machine to do the work for them. What could possibly go wrong?