The secret to selling books...?

So what is the secret to selling books...?

The point of a secret is that it's kept quiet, so of course that very fact makes people want to know the secret.

So the secret to selling books is probably to reveal a secret, but doesn't every books reveal a secret...? That secret may be in a factual book imparting knowledge, or it may be a story, letting us into a secret world that we would never have imagined for ourselves, where someone has opened up their imagination , captured it in print and set it free into the world for others to enjoy.

So I put it to you that there is no hard and fast secret to selling books, and books that advertise that they show you how to write a bestseller, or sell millions of copies of your books will probably just waste valuable reading time that could have been spent reading a book for entertainment, that might well have left you inspired and in the right frame of mind to set your imagination free and come up with a new and inspired way to write and sell your book..