The following is a quote from the first page in the book -
"Your comments, corrections and suggestions regarding this book are welcome. If you are less than pleased with this book and just want to write and tell us how stupid we are you will be wasting your time as our ex-wives already beat you to it. If you believe that there are factual errors we would like to hear about them but please try to keep your email as short as possible. All valid corrections will be incorporated into any future printings."