It's so easy to look foolish online.

All the marketing and advertising sells the book as what it is and hopes that the book will be displayed so that your readers can find it.

A mystery is a whodunit. You know what happened, but not how or who's behind it. A thriller, or a suspense, is a howdunit. You know what happened, and you usually know who did it, but you keep reading because you want to know how they pulled it off.

An author's ability to bring a marketing synopsis to the table - along with a great manuscript - makes a difference in what books get picked up. This is true for both fiction and nonfiction titles. You need to show your publisher what you've got in your marketing arsenal.

The marketability, the success of a book, ultimately rests with whether or not people will find the concept/characters/title/cover appealing.

You can write the best book you can, and that might still not be enough. Appeal isn't something that most writers can't strive for or identify. It's something even the best agents and editors can't always identify.

I began tailoring my books to cater to one or another universe of readers. I found it incredibly boring; and frankly, it felt stultifying. I'd previously been in advertising. I felt if I was going to create something to fit a specific market, I might as well have stayed with advertising.

Buy other authors' books when you go to their events. Even if you aren't going to read it. Even if you are going to give it away. Even if you aren't interested. Not just for the author but for the bookstore. It's karma and just plain good manners.

I placed my new novel, 'The Book of Lost Fragrances', in Paris, knowing it would be a challenge. But the book belonged in the city that is one of the greatest perfume capitals of the world and has been since for more than three centuries.

I have favorite authors from a lifetime of reading, so there are some I'll automatically read every time they have a new novel. Included in them: Robert Goddard, Jeffery Deaver, Sophie Kinsella, Katherine Neville, Greg Isle, Laurie King, Lee Child, Lisa Tucker, Susan Howatch, Paul Auster. Barry Eisler, David Hewson, Tracy Chevalier.