This book is horrible. A blind guy must of proofread it. Some of the questions at the end of each chapter ask for info that's not even on the prints. The architect and engineer that designed the "Lake House" prints needs fired for all the mistakes. I hope they didn't actually build that house. This is the most expensive fire kindling I have ever bought for $72.I feel sorry if you already bought it and paid more. DON'T WASTE YOUR MONEY!!!!!!!!!!