A book was ordered; sales person convinced me that I should order an additional book, which I did (my stupid mistake) -- weeks & weeks passed before delivery, although my charge account was charged immediately. That should have been my clue that you were not a reputable company. When books arrived, they were a bunch of jibberrish -- "information" contained in them is a bunch of garbage. Repeated calls to your 1-978-299-2298 number are not answered -- I am put on hold, for as long as 30 minutes, & then I hang up.