Help PlazaPapiro.com with a new Logo Design

PlazaPapiro.com

PlazaPapiro.com is the Latin American version of Blurb.com. It will be a marketplace for books created by the users. Please look at Blurb.com to understand the business of PlazaPapiro.com.

The following is a description of Blurb:

Blurb is a company and a community that believes passionately in the joy of books – reading them, making them, sharing them, and selling them.

Holding a finished book with your name on the cover is a truly amazing feeling; it’s one of those experiences everyone should have. As software people, designers, and publishing professionals at the top of our game, we realized something both incredible and obvious:

there’s no good reason why it should take tons of time, technical skills, big bucks, or friends in high places to publish a book. Or a zillion books, for that matter.

So we put our minds together, and developed a creative publishing service simple and smart enough to make anyone an author – every blogger, cook, photographer, parent, traveler, poet, pet owner, marketer, everyone. (This means you.)
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Please provide two versions of the logo. With and without the slogan: "publica, compra, vende"