You are thinking of writing a book.

There is a simple, effective formula to tell up-front if your idea will be “in-demand” and will sell like crazy – the system is outlined in the
Ultimate Information Entrepreneur’s Success Package

One of the main steps in that formula involves checking for products
that are already selling well in your market.

Amazon is the primary online source for giving us a strong hint about
consumer demand for a given topic.

You want to write a book, check Amazon for signs of similar topics,
and judge by the sales rank, how in-demand that topic is.

Now, many of us have always known that an Amazon sales rank of 1000
or less is a very good seller, a sales rank less than 10,000 is
certainly not bad – but a sales rank above 100,000 would be an
occassional seller at best.

I came across an article discussing Amazon sales rank in far more
detail – you can read it
Right Here

While it’s clear you cannot map an exact number of sales to Amazon
sales rank, you can estimate a range of product sales by rank – this
is extremely useful in determining possible demand for your own
topic.

Jeff

http://www.highertrustmarketing.com