I think the book you are referring to is called Its Deductible - Cash For Your Used Clothing. I did a quick check at amazon, and as I write this now, it is not in stock (
Click Here)
There is another one called
Its Deductible: Turning Non-Cash Donations Into Dollars, but it is also out of stock as I write this. The
CD Version appears to be in stock, but is quite pricey.