Attitude is all about style and the world of media and celebrity in the Shadowrun future. It is a superb reference but it is almost all background and information, very much a flavor sourcebook while there are some new equipment and rules, it is focused on adding depth to the sixth world not rules to the game.
Attitude: Sixth World Swagger for Shadowrun written by Lars Blumenstein, Rusty Childers, David A. Hill Jr., Jason M. Hardy, Adam Large, Je D. McLane, Cynthia Celeste Miller, William Murray, Elizabeth V. Nold, Malik Toms, Filamena Young, Russell Zimmerman and published by Catalyst Game Labs.
Sea of Stars RPG Design Journal 